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Finding the Fourth Proportional to 888.42, 1,225.54 and 556.78

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Solution

The fourth proportional to 888.42, 1,225.54 and 556.78 is: 768.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.42 : 1,225.54 = 556.78 : x
  2. Step 2: Convert to fraction form
    888.42/1,225.54 = 556.78/x
  3. Step 3: Cross multiply
    888.42x = 1,225.54 × 556.78
  4. Step 4: Simplify right side
    888.42x = 682,356.16
  5. Step 5: Solve for x
    x = 682,356.16/888.42
  6. Step 6: Final answer
    x = 768.06

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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.