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Finding the Fourth Proportional to 875.80, 1,207.47 and 614.17

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Solution

The fourth proportional to 875.80, 1,207.47 and 614.17 is: 846.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.80 : 1,207.47 = 614.17 : x
  2. Step 2: Convert to fraction form
    875.80/1,207.47 = 614.17/x
  3. Step 3: Cross multiply
    875.80x = 1,207.47 × 614.17
  4. Step 4: Simplify right side
    875.80x = 741,591.85
  5. Step 5: Solve for x
    x = 741,591.85/875.80
  6. Step 6: Final answer
    x = 846.76

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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.