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Finding the Fourth Proportional to 864.27, 1,193.54 and 615.60

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Solution

The fourth proportional to 864.27, 1,193.54 and 615.60 is: 850.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.27 : 1,193.54 = 615.60 : x
  2. Step 2: Convert to fraction form
    864.27/1,193.54 = 615.60/x
  3. Step 3: Cross multiply
    864.27x = 1,193.54 × 615.60
  4. Step 4: Simplify right side
    864.27x = 734,740.15
  5. Step 5: Solve for x
    x = 734,740.15/864.27
  6. Step 6: Final answer
    x = 850.13

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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.