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Finding the Fourth Proportional to 922.15, 1,279.61 and 886.51

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Solution

The fourth proportional to 922.15, 1,279.61 and 886.51 is: 1,230.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.15 : 1,279.61 = 886.51 : x
  2. Step 2: Convert to fraction form
    922.15/1,279.61 = 886.51/x
  3. Step 3: Cross multiply
    922.15x = 1,279.61 × 886.51
  4. Step 4: Simplify right side
    922.15x = 1,134,387.06
  5. Step 5: Solve for x
    x = 1,134,387.06/922.15
  6. Step 6: Final answer
    x = 1,230.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.