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Finding the Fourth Proportional to 884.78, 1,327.15 and 538.21

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Solution

The fourth proportional to 884.78, 1,327.15 and 538.21 is: 807.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.78 : 1,327.15 = 538.21 : x
  2. Step 2: Convert to fraction form
    884.78/1,327.15 = 538.21/x
  3. Step 3: Cross multiply
    884.78x = 1,327.15 × 538.21
  4. Step 4: Simplify right side
    884.78x = 714,278.77
  5. Step 5: Solve for x
    x = 714,278.77/884.78
  6. Step 6: Final answer
    x = 807.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.