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Finding the Fourth Proportional to 424.31, 585.55 and 237.79

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Solution

The fourth proportional to 424.31, 585.55 and 237.79 is: 328.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.31 : 585.55 = 237.79 : x
  2. Step 2: Convert to fraction form
    424.31/585.55 = 237.79/x
  3. Step 3: Cross multiply
    424.31x = 585.55 × 237.79
  4. Step 4: Simplify right side
    424.31x = 139,238.07
  5. Step 5: Solve for x
    x = 139,238.07/424.31
  6. Step 6: Final answer
    x = 328.16

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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.