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Finding the Fourth Proportional to 702.24, 1,052.40 and 445.28

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Solution

The fourth proportional to 702.24, 1,052.40 and 445.28 is: 667.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.24 : 1,052.40 = 445.28 : x
  2. Step 2: Convert to fraction form
    702.24/1,052.40 = 445.28/x
  3. Step 3: Cross multiply
    702.24x = 1,052.40 × 445.28
  4. Step 4: Simplify right side
    702.24x = 468,612.67
  5. Step 5: Solve for x
    x = 468,612.67/702.24
  6. Step 6: Final answer
    x = 667.31

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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.