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Finding the Fourth Proportional to 888.68, 1,226.38 and 495.70

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Solution

The fourth proportional to 888.68, 1,226.38 and 495.70 is: 684.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.68 : 1,226.38 = 495.70 : x
  2. Step 2: Convert to fraction form
    888.68/1,226.38 = 495.70/x
  3. Step 3: Cross multiply
    888.68x = 1,226.38 × 495.70
  4. Step 4: Simplify right side
    888.68x = 607,921.48
  5. Step 5: Solve for x
    x = 607,921.48/888.68
  6. Step 6: Final answer
    x = 684.07

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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.