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Finding the Fourth Proportional to 888.56, 1,226.04 and 557.12

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Solution

The fourth proportional to 888.56, 1,226.04 and 557.12 is: 768.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.56 : 1,226.04 = 557.12 : x
  2. Step 2: Convert to fraction form
    888.56/1,226.04 = 557.12/x
  3. Step 3: Cross multiply
    888.56x = 1,226.04 × 557.12
  4. Step 4: Simplify right side
    888.56x = 683,051.40
  5. Step 5: Solve for x
    x = 683,051.40/888.56
  6. Step 6: Final answer
    x = 768.72

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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.