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Finding the Fourth Proportional to 718.91, 1,084.33 and 633.31

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Solution

The fourth proportional to 718.91, 1,084.33 and 633.31 is: 955.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.91 : 1,084.33 = 633.31 : x
  2. Step 2: Convert to fraction form
    718.91/1,084.33 = 633.31/x
  3. Step 3: Cross multiply
    718.91x = 1,084.33 × 633.31
  4. Step 4: Simplify right side
    718.91x = 686,712.74
  5. Step 5: Solve for x
    x = 686,712.74/718.91
  6. Step 6: Final answer
    x = 955.22

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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.