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Finding the Fourth Proportional to 888.18, 1,225.59 and 495.21

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Solution

The fourth proportional to 888.18, 1,225.59 and 495.21 is: 683.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.18 : 1,225.59 = 495.21 : x
  2. Step 2: Convert to fraction form
    888.18/1,225.59 = 495.21/x
  3. Step 3: Cross multiply
    888.18x = 1,225.59 × 495.21
  4. Step 4: Simplify right side
    888.18x = 606,924.42
  5. Step 5: Solve for x
    x = 606,924.42/888.18
  6. Step 6: Final answer
    x = 683.33

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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.