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Finding the Fourth Proportional to 454.92, 681.87 and 290.13

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Solution

The fourth proportional to 454.92, 681.87 and 290.13 is: 434.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.92 : 681.87 = 290.13 : x
  2. Step 2: Convert to fraction form
    454.92/681.87 = 290.13/x
  3. Step 3: Cross multiply
    454.92x = 681.87 × 290.13
  4. Step 4: Simplify right side
    454.92x = 197,830.94
  5. Step 5: Solve for x
    x = 197,830.94/454.92
  6. Step 6: Final answer
    x = 434.87

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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.