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Finding the Fourth Proportional to 659,063.20, 988,537.20 and 215,831.20

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Solution

The fourth proportional to 659,063.20, 988,537.20 and 215,831.20 is: 323,727.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,063.20 : 988,537.20 = 215,831.20 : x
  2. Step 2: Convert to fraction form
    659,063.20/988,537.20 = 215,831.20/x
  3. Step 3: Cross multiply
    659,063.20x = 988,537.20 × 215,831.20
  4. Step 4: Simplify right side
    659,063.20x = 213,357,170,120.64
  5. Step 5: Solve for x
    x = 213,357,170,120.64/659,063.20
  6. Step 6: Final answer
    x = 323,727.94

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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.