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Finding the Fourth Proportional to 689.86, 951.81 and 655.23

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Solution

The fourth proportional to 689.86, 951.81 and 655.23 is: 904.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.86 : 951.81 = 655.23 : x
  2. Step 2: Convert to fraction form
    689.86/951.81 = 655.23/x
  3. Step 3: Cross multiply
    689.86x = 951.81 × 655.23
  4. Step 4: Simplify right side
    689.86x = 623,654.47
  5. Step 5: Solve for x
    x = 623,654.47/689.86
  6. Step 6: Final answer
    x = 904.03

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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.