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Finding the Fourth Proportional to 424.26, 585.30 and 258.45

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Solution

The fourth proportional to 424.26, 585.30 and 258.45 is: 356.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.26 : 585.30 = 258.45 : x
  2. Step 2: Convert to fraction form
    424.26/585.30 = 258.45/x
  3. Step 3: Cross multiply
    424.26x = 585.30 × 258.45
  4. Step 4: Simplify right side
    424.26x = 151,270.79
  5. Step 5: Solve for x
    x = 151,270.79/424.26
  6. Step 6: Final answer
    x = 356.55

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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.