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Finding the Fourth Proportional to 924.27, 1,380.08 and 918.87

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Solution

The fourth proportional to 924.27, 1,380.08 and 918.87 is: 1,372.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.27 : 1,380.08 = 918.87 : x
  2. Step 2: Convert to fraction form
    924.27/1,380.08 = 918.87/x
  3. Step 3: Cross multiply
    924.27x = 1,380.08 × 918.87
  4. Step 4: Simplify right side
    924.27x = 1,268,109.52
  5. Step 5: Solve for x
    x = 1,268,109.52/924.27
  6. Step 6: Final answer
    x = 1,372.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.