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Finding the Fourth Proportional to 801.16, 1,201.29 and 571.48

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Solution

The fourth proportional to 801.16, 1,201.29 and 571.48 is: 856.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.16 : 1,201.29 = 571.48 : x
  2. Step 2: Convert to fraction form
    801.16/1,201.29 = 571.48/x
  3. Step 3: Cross multiply
    801.16x = 1,201.29 × 571.48
  4. Step 4: Simplify right side
    801.16x = 686,513.21
  5. Step 5: Solve for x
    x = 686,513.21/801.16
  6. Step 6: Final answer
    x = 856.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.