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Finding the Fourth Proportional to 425.54, 586.80 and 285.66

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Solution

The fourth proportional to 425.54, 586.80 and 285.66 is: 393.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.54 : 586.80 = 285.66 : x
  2. Step 2: Convert to fraction form
    425.54/586.80 = 285.66/x
  3. Step 3: Cross multiply
    425.54x = 586.80 × 285.66
  4. Step 4: Simplify right side
    425.54x = 167,625.29
  5. Step 5: Solve for x
    x = 167,625.29/425.54
  6. Step 6: Final answer
    x = 393.91

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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.