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Finding the Fourth Proportional to 702.20, 1,053.57 and 291.35

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Solution

The fourth proportional to 702.20, 1,053.57 and 291.35 is: 437.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.20 : 1,053.57 = 291.35 : x
  2. Step 2: Convert to fraction form
    702.20/1,053.57 = 291.35/x
  3. Step 3: Cross multiply
    702.20x = 1,053.57 × 291.35
  4. Step 4: Simplify right side
    702.20x = 306,952.35
  5. Step 5: Solve for x
    x = 306,952.35/702.20
  6. Step 6: Final answer
    x = 437.13

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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.