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Finding the Fourth Proportional to 518,354.35, 777,531.53 and 429,780.85

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Solution

The fourth proportional to 518,354.35, 777,531.53 and 429,780.85 is: 644,671.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,354.35 : 777,531.53 = 429,780.85 : x
  2. Step 2: Convert to fraction form
    518,354.35/777,531.53 = 429,780.85/x
  3. Step 3: Cross multiply
    518,354.35x = 777,531.53 × 429,780.85
  4. Step 4: Simplify right side
    518,354.35x = 334,168,159,716.30
  5. Step 5: Solve for x
    x = 334,168,159,716.30/518,354.35
  6. Step 6: Final answer
    x = 644,671.28

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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.