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Finding the Fourth Proportional to 702.26, 1,053.67 and 311.99

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Solution

The fourth proportional to 702.26, 1,053.67 and 311.99 is: 468.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.26 : 1,053.67 = 311.99 : x
  2. Step 2: Convert to fraction form
    702.26/1,053.67 = 311.99/x
  3. Step 3: Cross multiply
    702.26x = 1,053.67 × 311.99
  4. Step 4: Simplify right side
    702.26x = 328,736.36
  5. Step 5: Solve for x
    x = 328,736.36/702.26
  6. Step 6: Final answer
    x = 468.11

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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.