Home / 1,008.30-1,512.48-521.04

Finding the Fourth Proportional to 1,008.30, 1,512.48 and 521.04

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Solution

The fourth proportional to 1,008.30, 1,512.48 and 521.04 is: 781.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.30 : 1,512.48 = 521.04 : x
  2. Step 2: Convert to fraction form
    1,008.30/1,512.48 = 521.04/x
  3. Step 3: Cross multiply
    1,008.30x = 1,512.48 × 521.04
  4. Step 4: Simplify right side
    1,008.30x = 788,062.58
  5. Step 5: Solve for x
    x = 788,062.58/1,008.30
  6. Step 6: Final answer
    x = 781.58

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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.