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Finding the Fourth Proportional to 871.39, 1,307.28 and 294.25

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Solution

The fourth proportional to 871.39, 1,307.28 and 294.25 is: 441.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.39 : 1,307.28 = 294.25 : x
  2. Step 2: Convert to fraction form
    871.39/1,307.28 = 294.25/x
  3. Step 3: Cross multiply
    871.39x = 1,307.28 × 294.25
  4. Step 4: Simplify right side
    871.39x = 384,667.14
  5. Step 5: Solve for x
    x = 384,667.14/871.39
  6. Step 6: Final answer
    x = 441.44

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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.