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Finding the Fourth Proportional to 1,458.76, 2,012.32 and 868.92

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Solution

The fourth proportional to 1,458.76, 2,012.32 and 868.92 is: 1,198.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.76 : 2,012.32 = 868.92 : x
  2. Step 2: Convert to fraction form
    1,458.76/2,012.32 = 868.92/x
  3. Step 3: Cross multiply
    1,458.76x = 2,012.32 × 868.92
  4. Step 4: Simplify right side
    1,458.76x = 1,748,545.09
  5. Step 5: Solve for x
    x = 1,748,545.09/1,458.76
  6. Step 6: Final answer
    x = 1,198.65

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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.