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Finding the Fourth Proportional to 888.40, 1,225.99 and 495.42

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Solution

The fourth proportional to 888.40, 1,225.99 and 495.42 is: 683.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.40 : 1,225.99 = 495.42 : x
  2. Step 2: Convert to fraction form
    888.40/1,225.99 = 495.42/x
  3. Step 3: Cross multiply
    888.40x = 1,225.99 × 495.42
  4. Step 4: Simplify right side
    888.40x = 607,379.97
  5. Step 5: Solve for x
    x = 607,379.97/888.40
  6. Step 6: Final answer
    x = 683.68

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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.