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Finding the Fourth Proportional to 543,803.60, 815,705.40 and 417,686.60

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Solution

The fourth proportional to 543,803.60, 815,705.40 and 417,686.60 is: 626,529.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,803.60 : 815,705.40 = 417,686.60 : x
  2. Step 2: Convert to fraction form
    543,803.60/815,705.40 = 417,686.60/x
  3. Step 3: Cross multiply
    543,803.60x = 815,705.40 × 417,686.60
  4. Step 4: Simplify right side
    543,803.60x = 340,709,215,127.64
  5. Step 5: Solve for x
    x = 340,709,215,127.64/543,803.60
  6. Step 6: Final answer
    x = 626,529.90

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.