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Finding the Fourth Proportional to 818.74, 1,130.16 and 731.26

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Solution

The fourth proportional to 818.74, 1,130.16 and 731.26 is: 1,009.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.74 : 1,130.16 = 731.26 : x
  2. Step 2: Convert to fraction form
    818.74/1,130.16 = 731.26/x
  3. Step 3: Cross multiply
    818.74x = 1,130.16 × 731.26
  4. Step 4: Simplify right side
    818.74x = 826,440.80
  5. Step 5: Solve for x
    x = 826,440.80/818.74
  6. Step 6: Final answer
    x = 1,009.41

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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.