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Finding the Fourth Proportional to 872.94, 1,204.61 and 479.90

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Solution

The fourth proportional to 872.94, 1,204.61 and 479.90 is: 662.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.94 : 1,204.61 = 479.90 : x
  2. Step 2: Convert to fraction form
    872.94/1,204.61 = 479.90/x
  3. Step 3: Cross multiply
    872.94x = 1,204.61 × 479.90
  4. Step 4: Simplify right side
    872.94x = 578,092.34
  5. Step 5: Solve for x
    x = 578,092.34/872.94
  6. Step 6: Final answer
    x = 662.24

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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.