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Finding the Fourth Proportional to 698.80, 963.22 and 615.37

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Solution

The fourth proportional to 698.80, 963.22 and 615.37 is: 848.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.80 : 963.22 = 615.37 : x
  2. Step 2: Convert to fraction form
    698.80/963.22 = 615.37/x
  3. Step 3: Cross multiply
    698.80x = 963.22 × 615.37
  4. Step 4: Simplify right side
    698.80x = 592,736.69
  5. Step 5: Solve for x
    x = 592,736.69/698.80
  6. Step 6: Final answer
    x = 848.22

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1.5x scale

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.