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Finding the Fourth Proportional to 807.17, 1,115.36 and 630.59

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Solution

The fourth proportional to 807.17, 1,115.36 and 630.59 is: 871.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.17 : 1,115.36 = 630.59 : x
  2. Step 2: Convert to fraction form
    807.17/1,115.36 = 630.59/x
  3. Step 3: Cross multiply
    807.17x = 1,115.36 × 630.59
  4. Step 4: Simplify right side
    807.17x = 703,339.23
  5. Step 5: Solve for x
    x = 703,339.23/807.17
  6. Step 6: Final answer
    x = 871.36

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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.