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Finding the Fourth Proportional to 676.13, 1,012.83 and 521.52

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Solution

The fourth proportional to 676.13, 1,012.83 and 521.52 is: 781.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.13 : 1,012.83 = 521.52 : x
  2. Step 2: Convert to fraction form
    676.13/1,012.83 = 521.52/x
  3. Step 3: Cross multiply
    676.13x = 1,012.83 × 521.52
  4. Step 4: Simplify right side
    676.13x = 528,211.10
  5. Step 5: Solve for x
    x = 528,211.10/676.13
  6. Step 6: Final answer
    x = 781.23

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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.