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Finding the Fourth Proportional to 659,138.52, 909,618.33 and 387,217.88

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Solution

The fourth proportional to 659,138.52, 909,618.33 and 387,217.88 is: 534,364.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,138.52 : 909,618.33 = 387,217.88 : x
  2. Step 2: Convert to fraction form
    659,138.52/909,618.33 = 387,217.88/x
  3. Step 3: Cross multiply
    659,138.52x = 909,618.33 × 387,217.88
  4. Step 4: Simplify right side
    659,138.52x = 352,220,481,351.74
  5. Step 5: Solve for x
    x = 352,220,481,351.74/659,138.52
  6. Step 6: Final answer
    x = 534,364.89

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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.