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Finding the Fourth Proportional to 872.01, 1,203.34 and 479.02

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Solution

The fourth proportional to 872.01, 1,203.34 and 479.02 is: 661.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.01 : 1,203.34 = 479.02 : x
  2. Step 2: Convert to fraction form
    872.01/1,203.34 = 479.02/x
  3. Step 3: Cross multiply
    872.01x = 1,203.34 × 479.02
  4. Step 4: Simplify right side
    872.01x = 576,423.93
  5. Step 5: Solve for x
    x = 576,423.93/872.01
  6. Step 6: Final answer
    x = 661.03

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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.