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Finding the Fourth Proportional to 577,985.10, 866,977.65 and 478,452.30

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Solution

The fourth proportional to 577,985.10, 866,977.65 and 478,452.30 is: 717,678.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,985.10 : 866,977.65 = 478,452.30 : x
  2. Step 2: Convert to fraction form
    577,985.10/866,977.65 = 478,452.30/x
  3. Step 3: Cross multiply
    577,985.10x = 866,977.65 × 478,452.30
  4. Step 4: Simplify right side
    577,985.10x = 414,807,450,691.10
  5. Step 5: Solve for x
    x = 414,807,450,691.10/577,985.10
  6. Step 6: Final answer
    x = 717,678.45

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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.