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Finding the Fourth Proportional to 872.54, 1,204.23 and 557.96

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Solution

The fourth proportional to 872.54, 1,204.23 and 557.96 is: 770.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.54 : 1,204.23 = 557.96 : x
  2. Step 2: Convert to fraction form
    872.54/1,204.23 = 557.96/x
  3. Step 3: Cross multiply
    872.54x = 1,204.23 × 557.96
  4. Step 4: Simplify right side
    872.54x = 671,908.24
  5. Step 5: Solve for x
    x = 671,908.24/872.54
  6. Step 6: Final answer
    x = 770.06

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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.