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Finding the Fourth Proportional to 519,908.20, 717,089.16 and 328,737.40

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Solution

The fourth proportional to 519,908.20, 717,089.16 and 328,737.40 is: 453,414.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,908.20 : 717,089.16 = 328,737.40 : x
  2. Step 2: Convert to fraction form
    519,908.20/717,089.16 = 328,737.40/x
  3. Step 3: Cross multiply
    519,908.20x = 717,089.16 × 328,737.40
  4. Step 4: Simplify right side
    519,908.20x = 235,734,026,026.58
  5. Step 5: Solve for x
    x = 235,734,026,026.58/519,908.20
  6. Step 6: Final answer
    x = 453,414.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.