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Finding the Fourth Proportional to 888.40, 1,225.99 and 495.43

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Solution

The fourth proportional to 888.40, 1,225.99 and 495.43 is: 683.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.40 : 1,225.99 = 495.43 : x
  2. Step 2: Convert to fraction form
    888.40/1,225.99 = 495.43/x
  3. Step 3: Cross multiply
    888.40x = 1,225.99 × 495.43
  4. Step 4: Simplify right side
    888.40x = 607,392.23
  5. Step 5: Solve for x
    x = 607,392.23/888.40
  6. Step 6: Final answer
    x = 683.69

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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.