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Finding the Fourth Proportional to 424.67, 586.13 and 285.02

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Solution

The fourth proportional to 424.67, 586.13 and 285.02 is: 393.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.67 : 586.13 = 285.02 : x
  2. Step 2: Convert to fraction form
    424.67/586.13 = 285.02/x
  3. Step 3: Cross multiply
    424.67x = 586.13 × 285.02
  4. Step 4: Simplify right side
    424.67x = 167,058.77
  5. Step 5: Solve for x
    x = 167,058.77/424.67
  6. Step 6: Final answer
    x = 393.38

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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.