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Finding the Fourth Proportional to 716.16, 1,080.08 and 693.12

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Solution

The fourth proportional to 716.16, 1,080.08 and 693.12 is: 1,045.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.16 : 1,080.08 = 693.12 : x
  2. Step 2: Convert to fraction form
    716.16/1,080.08 = 693.12/x
  3. Step 3: Cross multiply
    716.16x = 1,080.08 × 693.12
  4. Step 4: Simplify right side
    716.16x = 748,625.05
  5. Step 5: Solve for x
    x = 748,625.05/716.16
  6. Step 6: Final answer
    x = 1,045.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.