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Finding the Fourth Proportional to 698.82, 960.33 and 666.70

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Solution

The fourth proportional to 698.82, 960.33 and 666.70 is: 916.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.82 : 960.33 = 666.70 : x
  2. Step 2: Convert to fraction form
    698.82/960.33 = 666.70/x
  3. Step 3: Cross multiply
    698.82x = 960.33 × 666.70
  4. Step 4: Simplify right side
    698.82x = 640,248.68
  5. Step 5: Solve for x
    x = 640,248.68/698.82
  6. Step 6: Final answer
    x = 916.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.