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Finding the Fourth Proportional to 424.18, 585.60 and 258.43

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Solution

The fourth proportional to 424.18, 585.60 and 258.43 is: 356.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.18 : 585.60 = 258.43 : x
  2. Step 2: Convert to fraction form
    424.18/585.60 = 258.43/x
  3. Step 3: Cross multiply
    424.18x = 585.60 × 258.43
  4. Step 4: Simplify right side
    424.18x = 151,336.61
  5. Step 5: Solve for x
    x = 151,336.61/424.18
  6. Step 6: Final answer
    x = 356.77

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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.