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Finding the Fourth Proportional to 520,388.96, 776,186.50 and 504,638.24

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Solution

The fourth proportional to 520,388.96, 776,186.50 and 504,638.24 is: 752,693.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,388.96 : 776,186.50 = 504,638.24 : x
  2. Step 2: Convert to fraction form
    520,388.96/776,186.50 = 504,638.24/x
  3. Step 3: Cross multiply
    520,388.96x = 776,186.50 × 504,638.24
  4. Step 4: Simplify right side
    520,388.96x = 391,693,389,271.76
  5. Step 5: Solve for x
    x = 391,693,389,271.76/520,388.96
  6. Step 6: Final answer
    x = 752,693.50

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Half scale
Find fourth proportional to 1,040,777.92, 1,552,373 and 1,009,276.48
Double scale
Find fourth proportional to 520,389.96, 776,187.99 and 504,639.24
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.