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Finding the Fourth Proportional to 394.73, 545.03 and 284.91

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Solution

The fourth proportional to 394.73, 545.03 and 284.91 is: 393.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.73 : 545.03 = 284.91 : x
  2. Step 2: Convert to fraction form
    394.73/545.03 = 284.91/x
  3. Step 3: Cross multiply
    394.73x = 545.03 × 284.91
  4. Step 4: Simplify right side
    394.73x = 155,284.50
  5. Step 5: Solve for x
    x = 155,284.50/394.73
  6. Step 6: Final answer
    x = 393.39

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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.