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Finding the Fourth Proportional to 888.27, 1,225.28 and 639.24

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Solution

The fourth proportional to 888.27, 1,225.28 and 639.24 is: 881.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.27 : 1,225.28 = 639.24 : x
  2. Step 2: Convert to fraction form
    888.27/1,225.28 = 639.24/x
  3. Step 3: Cross multiply
    888.27x = 1,225.28 × 639.24
  4. Step 4: Simplify right side
    888.27x = 783,249.59
  5. Step 5: Solve for x
    x = 783,249.59/888.27
  6. Step 6: Final answer
    x = 881.77

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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.