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Finding the Fourth Proportional to 487.68, 730.94 and 281.83

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Solution

The fourth proportional to 487.68, 730.94 and 281.83 is: 422.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.68 : 730.94 = 281.83 : x
  2. Step 2: Convert to fraction form
    487.68/730.94 = 281.83/x
  3. Step 3: Cross multiply
    487.68x = 730.94 × 281.83
  4. Step 4: Simplify right side
    487.68x = 205,995.76
  5. Step 5: Solve for x
    x = 205,995.76/487.68
  6. Step 6: Final answer
    x = 422.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.