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Finding the Fourth Proportional to 1,062.50, 1,465.17 and 865.40

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Solution

The fourth proportional to 1,062.50, 1,465.17 and 865.40 is: 1,193.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,062.50 : 1,465.17 = 865.40 : x
  2. Step 2: Convert to fraction form
    1,062.50/1,465.17 = 865.40/x
  3. Step 3: Cross multiply
    1,062.50x = 1,465.17 × 865.40
  4. Step 4: Simplify right side
    1,062.50x = 1,267,958.12
  5. Step 5: Solve for x
    x = 1,267,958.12/1,062.50
  6. Step 6: Final answer
    x = 1,193.37

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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.