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Finding the Fourth Proportional to 424.48, 585.36 and 355.36

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Solution

The fourth proportional to 424.48, 585.36 and 355.36 is: 490.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.48 : 585.36 = 355.36 : x
  2. Step 2: Convert to fraction form
    424.48/585.36 = 355.36/x
  3. Step 3: Cross multiply
    424.48x = 585.36 × 355.36
  4. Step 4: Simplify right side
    424.48x = 208,013.53
  5. Step 5: Solve for x
    x = 208,013.53/424.48
  6. Step 6: Final answer
    x = 490.04

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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.