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Finding the Fourth Proportional to 424.56, 585.36 and 306.48

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Solution

The fourth proportional to 424.56, 585.36 and 306.48 is: 422.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.56 : 585.36 = 306.48 : x
  2. Step 2: Convert to fraction form
    424.56/585.36 = 306.48/x
  3. Step 3: Cross multiply
    424.56x = 585.36 × 306.48
  4. Step 4: Simplify right side
    424.56x = 179,401.13
  5. Step 5: Solve for x
    x = 179,401.13/424.56
  6. Step 6: Final answer
    x = 422.56

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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.