Home / 525,784.10-788,676.15-399,812.90

Finding the Fourth Proportional to 525,784.10, 788,676.15 and 399,812.90

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Solution

The fourth proportional to 525,784.10, 788,676.15 and 399,812.90 is: 599,719.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,784.10 : 788,676.15 = 399,812.90 : x
  2. Step 2: Convert to fraction form
    525,784.10/788,676.15 = 399,812.90/x
  3. Step 3: Cross multiply
    525,784.10x = 788,676.15 × 399,812.90
  4. Step 4: Simplify right side
    525,784.10x = 315,322,898,692.34
  5. Step 5: Solve for x
    x = 315,322,898,692.34/525,784.10
  6. Step 6: Final answer
    x = 599,719.35

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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.