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Finding the Fourth Proportional to 888.80, 1,225.44 and 667.04

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Solution

The fourth proportional to 888.80, 1,225.44 and 667.04 is: 919.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.80 : 1,225.44 = 667.04 : x
  2. Step 2: Convert to fraction form
    888.80/1,225.44 = 667.04/x
  3. Step 3: Cross multiply
    888.80x = 1,225.44 × 667.04
  4. Step 4: Simplify right side
    888.80x = 817,417.50
  5. Step 5: Solve for x
    x = 817,417.50/888.80
  6. Step 6: Final answer
    x = 919.69

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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.