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Finding the Fourth Proportional to 956.03, 1,431.61 and 875.84

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Solution

The fourth proportional to 956.03, 1,431.61 and 875.84 is: 1,311.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.03 : 1,431.61 = 875.84 : x
  2. Step 2: Convert to fraction form
    956.03/1,431.61 = 875.84/x
  3. Step 3: Cross multiply
    956.03x = 1,431.61 × 875.84
  4. Step 4: Simplify right side
    956.03x = 1,253,857.72
  5. Step 5: Solve for x
    x = 1,253,857.72/956.03
  6. Step 6: Final answer
    x = 1,311.53

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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.