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Finding the Fourth Proportional to 691.67, 955.28 and 536.18

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Solution

The fourth proportional to 691.67, 955.28 and 536.18 is: 740.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.67 : 955.28 = 536.18 : x
  2. Step 2: Convert to fraction form
    691.67/955.28 = 536.18/x
  3. Step 3: Cross multiply
    691.67x = 955.28 × 536.18
  4. Step 4: Simplify right side
    691.67x = 512,201.74
  5. Step 5: Solve for x
    x = 512,201.74/691.67
  6. Step 6: Final answer
    x = 740.53

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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.