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Finding the Fourth Proportional to 518,607.10, 777,910.65 and 487,114.30

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Solution

The fourth proportional to 518,607.10, 777,910.65 and 487,114.30 is: 730,671.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,607.10 : 777,910.65 = 487,114.30 : x
  2. Step 2: Convert to fraction form
    518,607.10/777,910.65 = 487,114.30/x
  3. Step 3: Cross multiply
    518,607.10x = 777,910.65 × 487,114.30
  4. Step 4: Simplify right side
    518,607.10x = 378,931,401,737.30
  5. Step 5: Solve for x
    x = 378,931,401,737.30/518,607.10
  6. Step 6: Final answer
    x = 730,671.45

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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.