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Finding the Fourth Proportional to 395,062.11, 592,687.50 and 128,822.88

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Solution

The fourth proportional to 395,062.11, 592,687.50 and 128,822.88 is: 193,265.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,062.11 : 592,687.50 = 128,822.88 : x
  2. Step 2: Convert to fraction form
    395,062.11/592,687.50 = 128,822.88/x
  3. Step 3: Cross multiply
    395,062.11x = 592,687.50 × 128,822.88
  4. Step 4: Simplify right side
    395,062.11x = 76,351,710,690
  5. Step 5: Solve for x
    x = 76,351,710,690/395,062.11
  6. Step 6: Final answer
    x = 193,265.08

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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.