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Finding the Fourth Proportional to 638,694.50, 956,957.22 and 385,442.87

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Solution

The fourth proportional to 638,694.50, 956,957.22 and 385,442.87 is: 577,509.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,694.50 : 956,957.22 = 385,442.87 : x
  2. Step 2: Convert to fraction form
    638,694.50/956,957.22 = 385,442.87/x
  3. Step 3: Cross multiply
    638,694.50x = 956,957.22 × 385,442.87
  4. Step 4: Simplify right side
    638,694.50x = 368,852,332,559.24
  5. Step 5: Solve for x
    x = 368,852,332,559.24/638,694.50
  6. Step 6: Final answer
    x = 577,509.80

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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.