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Finding the Fourth Proportional to 871.93, 1,203.33 and 479.03

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Solution

The fourth proportional to 871.93, 1,203.33 and 479.03 is: 661.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.93 : 1,203.33 = 479.03 : x
  2. Step 2: Convert to fraction form
    871.93/1,203.33 = 479.03/x
  3. Step 3: Cross multiply
    871.93x = 1,203.33 × 479.03
  4. Step 4: Simplify right side
    871.93x = 576,425.15
  5. Step 5: Solve for x
    x = 576,425.15/871.93
  6. Step 6: Final answer
    x = 661.09

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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.