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Finding the Fourth Proportional to 387,728.90, 581,594.28 and 117,859.52

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Solution

The fourth proportional to 387,728.90, 581,594.28 and 117,859.52 is: 176,789.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,728.90 : 581,594.28 = 117,859.52 : x
  2. Step 2: Convert to fraction form
    387,728.90/581,594.28 = 117,859.52/x
  3. Step 3: Cross multiply
    387,728.90x = 581,594.28 × 117,859.52
  4. Step 4: Simplify right side
    387,728.90x = 68,546,422,675.55
  5. Step 5: Solve for x
    x = 68,546,422,675.55/387,728.90
  6. Step 6: Final answer
    x = 176,789.56

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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.