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Finding the Fourth Proportional to 663,377.75, 915,451.16 and 372,989.58

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Solution

The fourth proportional to 663,377.75, 915,451.16 and 372,989.58 is: 514,719.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,377.75 : 915,451.16 = 372,989.58 : x
  2. Step 2: Convert to fraction form
    663,377.75/915,451.16 = 372,989.58/x
  3. Step 3: Cross multiply
    663,377.75x = 915,451.16 × 372,989.58
  4. Step 4: Simplify right side
    663,377.75x = 341,453,743,678.91
  5. Step 5: Solve for x
    x = 341,453,743,678.91/663,377.75
  6. Step 6: Final answer
    x = 514,719.92

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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.