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Finding the Fourth Proportional to 442,831.70, 664,247.55 and 418,337.30

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Solution

The fourth proportional to 442,831.70, 664,247.55 and 418,337.30 is: 627,505.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,831.70 : 664,247.55 = 418,337.30 : x
  2. Step 2: Convert to fraction form
    442,831.70/664,247.55 = 418,337.30/x
  3. Step 3: Cross multiply
    442,831.70x = 664,247.55 × 418,337.30
  4. Step 4: Simplify right side
    442,831.70x = 277,879,526,598.62
  5. Step 5: Solve for x
    x = 277,879,526,598.62/442,831.70
  6. Step 6: Final answer
    x = 627,505.95

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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.