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Finding the Fourth Proportional to 438,780, 605,516.40 and 237,576

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Solution

The fourth proportional to 438,780, 605,516.40 and 237,576 is: 327,854.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,780 : 605,516.40 = 237,576 : x
  2. Step 2: Convert to fraction form
    438,780/605,516.40 = 237,576/x
  3. Step 3: Cross multiply
    438,780x = 605,516.40 × 237,576
  4. Step 4: Simplify right side
    438,780x = 143,856,164,246.40
  5. Step 5: Solve for x
    x = 143,856,164,246.40/438,780
  6. Step 6: Final answer
    x = 327,854.88

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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.