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Finding the Fourth Proportional to 698.70, 961.66 and 615.26

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Solution

The fourth proportional to 698.70, 961.66 and 615.26 is: 846.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.70 : 961.66 = 615.26 : x
  2. Step 2: Convert to fraction form
    698.70/961.66 = 615.26/x
  3. Step 3: Cross multiply
    698.70x = 961.66 × 615.26
  4. Step 4: Simplify right side
    698.70x = 591,670.93
  5. Step 5: Solve for x
    x = 591,670.93/698.70
  6. Step 6: Final answer
    x = 846.82

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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.