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Finding the Fourth Proportional to 888.39, 1,225.98 and 495.40

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Solution

The fourth proportional to 888.39, 1,225.98 and 495.40 is: 683.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.39 : 1,225.98 = 495.40 : x
  2. Step 2: Convert to fraction form
    888.39/1,225.98 = 495.40/x
  3. Step 3: Cross multiply
    888.39x = 1,225.98 × 495.40
  4. Step 4: Simplify right side
    888.39x = 607,351.08
  5. Step 5: Solve for x
    x = 607,351.08/888.39
  6. Step 6: Final answer
    x = 683.66

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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.