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Finding the Fourth Proportional to 659,138.92, 909,603.52 and 387,231.60

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Solution

The fourth proportional to 659,138.92, 909,603.52 and 387,231.60 is: 534,374.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,138.92 : 909,603.52 = 387,231.60 : x
  2. Step 2: Convert to fraction form
    659,138.92/909,603.52 = 387,231.60/x
  3. Step 3: Cross multiply
    659,138.92x = 909,603.52 × 387,231.60
  4. Step 4: Simplify right side
    659,138.92x = 352,227,231,036.34
  5. Step 5: Solve for x
    x = 352,227,231,036.34/659,138.92
  6. Step 6: Final answer
    x = 534,374.80

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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.