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Finding the Fourth Proportional to 888.02, 1,225.56 and 666.56

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Solution

The fourth proportional to 888.02, 1,225.56 and 666.56 is: 919.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.02 : 1,225.56 = 666.56 : x
  2. Step 2: Convert to fraction form
    888.02/1,225.56 = 666.56/x
  3. Step 3: Cross multiply
    888.02x = 1,225.56 × 666.56
  4. Step 4: Simplify right side
    888.02x = 816,909.27
  5. Step 5: Solve for x
    x = 816,909.27/888.02
  6. Step 6: Final answer
    x = 919.92

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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.