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Finding the Fourth Proportional to 1,008.27, 1,512.45 and 521.01

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Solution

The fourth proportional to 1,008.27, 1,512.45 and 521.01 is: 781.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.27 : 1,512.45 = 521.01 : x
  2. Step 2: Convert to fraction form
    1,008.27/1,512.45 = 521.01/x
  3. Step 3: Cross multiply
    1,008.27x = 1,512.45 × 521.01
  4. Step 4: Simplify right side
    1,008.27x = 788,001.57
  5. Step 5: Solve for x
    x = 788,001.57/1,008.27
  6. Step 6: Final answer
    x = 781.54

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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.