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Finding the Fourth Proportional to 1,062.41, 1,465.75 and 689.20

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Solution

The fourth proportional to 1,062.41, 1,465.75 and 689.20 is: 950.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,062.41 : 1,465.75 = 689.20 : x
  2. Step 2: Convert to fraction form
    1,062.41/1,465.75 = 689.20/x
  3. Step 3: Cross multiply
    1,062.41x = 1,465.75 × 689.20
  4. Step 4: Simplify right side
    1,062.41x = 1,010,194.90
  5. Step 5: Solve for x
    x = 1,010,194.90/1,062.41
  6. Step 6: Final answer
    x = 950.85

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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.