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Finding the Fourth Proportional to 387,488.28, 581,234.28 and 117,618.75

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Solution

The fourth proportional to 387,488.28, 581,234.28 and 117,618.75 is: 176,428.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,488.28 : 581,234.28 = 117,618.75 : x
  2. Step 2: Convert to fraction form
    387,488.28/581,234.28 = 117,618.75/x
  3. Step 3: Cross multiply
    387,488.28x = 581,234.28 × 117,618.75
  4. Step 4: Simplify right side
    387,488.28x = 68,364,049,470.75
  5. Step 5: Solve for x
    x = 68,364,049,470.75/387,488.28
  6. Step 6: Final answer
    x = 176,428.69

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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.