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Finding the Fourth Proportional to 424.78, 585.92 and 306.93

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Solution

The fourth proportional to 424.78, 585.92 and 306.93 is: 423.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.78 : 585.92 = 306.93 : x
  2. Step 2: Convert to fraction form
    424.78/585.92 = 306.93/x
  3. Step 3: Cross multiply
    424.78x = 585.92 × 306.93
  4. Step 4: Simplify right side
    424.78x = 179,835.57
  5. Step 5: Solve for x
    x = 179,835.57/424.78
  6. Step 6: Final answer
    x = 423.36

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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.