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Finding the Fourth Proportional to 442,667.11, 663,817.33 and 138,959.79

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Solution

The fourth proportional to 442,667.11, 663,817.33 and 138,959.79 is: 208,382.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,667.11 : 663,817.33 = 138,959.79 : x
  2. Step 2: Convert to fraction form
    442,667.11/663,817.33 = 138,959.79/x
  3. Step 3: Cross multiply
    442,667.11x = 663,817.33 × 138,959.79
  4. Step 4: Simplify right side
    442,667.11x = 92,243,916,775.16
  5. Step 5: Solve for x
    x = 92,243,916,775.16/442,667.11
  6. Step 6: Final answer
    x = 208,382.13

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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.