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Finding the Fourth Proportional to 702.05, 1,052.21 and 409.68

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Solution

The fourth proportional to 702.05, 1,052.21 and 409.68 is: 614.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.05 : 1,052.21 = 409.68 : x
  2. Step 2: Convert to fraction form
    702.05/1,052.21 = 409.68/x
  3. Step 3: Cross multiply
    702.05x = 1,052.21 × 409.68
  4. Step 4: Simplify right side
    702.05x = 431,070.42
  5. Step 5: Solve for x
    x = 431,070.42/702.05
  6. Step 6: Final answer
    x = 614.02

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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.