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Finding the Fourth Proportional to 702.96, 1,052.18 and 520.28

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Solution

The fourth proportional to 702.96, 1,052.18 and 520.28 is: 778.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.96 : 1,052.18 = 520.28 : x
  2. Step 2: Convert to fraction form
    702.96/1,052.18 = 520.28/x
  3. Step 3: Cross multiply
    702.96x = 1,052.18 × 520.28
  4. Step 4: Simplify right side
    702.96x = 547,428.21
  5. Step 5: Solve for x
    x = 547,428.21/702.96
  6. Step 6: Final answer
    x = 778.75

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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.