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Finding the Fourth Proportional to 518,328.92, 777,493.38 and 429,755.42

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Solution

The fourth proportional to 518,328.92, 777,493.38 and 429,755.42 is: 644,633.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,328.92 : 777,493.38 = 429,755.42 : x
  2. Step 2: Convert to fraction form
    518,328.92/777,493.38 = 429,755.42/x
  3. Step 3: Cross multiply
    518,328.92x = 777,493.38 × 429,755.42
  4. Step 4: Simplify right side
    518,328.92x = 334,131,988,032.88
  5. Step 5: Solve for x
    x = 334,131,988,032.88/518,328.92
  6. Step 6: Final answer
    x = 644,633.12

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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.