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Finding the Fourth Proportional to 425,055.72, 636,008.78 and 312,818.88

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Solution

The fourth proportional to 425,055.72, 636,008.78 and 312,818.88 is: 468,069.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,055.72 : 636,008.78 = 312,818.88 : x
  2. Step 2: Convert to fraction form
    425,055.72/636,008.78 = 312,818.88/x
  3. Step 3: Cross multiply
    425,055.72x = 636,008.78 × 312,818.88
  4. Step 4: Simplify right side
    425,055.72x = 198,955,554,229.77
  5. Step 5: Solve for x
    x = 198,955,554,229.77/425,055.72
  6. Step 6: Final answer
    x = 468,069.35

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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.