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Finding the Fourth Proportional to 1,033.13, 1,425.86 and 718.22

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Solution

The fourth proportional to 1,033.13, 1,425.86 and 718.22 is: 991.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.13 : 1,425.86 = 718.22 : x
  2. Step 2: Convert to fraction form
    1,033.13/1,425.86 = 718.22/x
  3. Step 3: Cross multiply
    1,033.13x = 1,425.86 × 718.22
  4. Step 4: Simplify right side
    1,033.13x = 1,024,070.45
  5. Step 5: Solve for x
    x = 1,024,070.45/1,033.13
  6. Step 6: Final answer
    x = 991.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.