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Finding the Fourth Proportional to 1,200.29, 1,655.85 and 868.19

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Solution

The fourth proportional to 1,200.29, 1,655.85 and 868.19 is: 1,197.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.29 : 1,655.85 = 868.19 : x
  2. Step 2: Convert to fraction form
    1,200.29/1,655.85 = 868.19/x
  3. Step 3: Cross multiply
    1,200.29x = 1,655.85 × 868.19
  4. Step 4: Simplify right side
    1,200.29x = 1,437,592.41
  5. Step 5: Solve for x
    x = 1,437,592.41/1,200.29
  6. Step 6: Final answer
    x = 1,197.70

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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.