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Finding the Fourth Proportional to 1,006.30, 1,508.91 and 458.00

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Solution

The fourth proportional to 1,006.30, 1,508.91 and 458.00 is: 686.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.30 : 1,508.91 = 458.00 : x
  2. Step 2: Convert to fraction form
    1,006.30/1,508.91 = 458.00/x
  3. Step 3: Cross multiply
    1,006.30x = 1,508.91 × 458.00
  4. Step 4: Simplify right side
    1,006.30x = 691,079.75
  5. Step 5: Solve for x
    x = 691,079.75/1,006.30
  6. Step 6: Final answer
    x = 686.75

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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.