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Finding the Fourth Proportional to 886.85, 1,330.35 and 874.86

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Solution

The fourth proportional to 886.85, 1,330.35 and 874.86 is: 1,312.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.85 : 1,330.35 = 874.86 : x
  2. Step 2: Convert to fraction form
    886.85/1,330.35 = 874.86/x
  3. Step 3: Cross multiply
    886.85x = 1,330.35 × 874.86
  4. Step 4: Simplify right side
    886.85x = 1,163,861.73
  5. Step 5: Solve for x
    x = 1,163,861.73/886.85
  6. Step 6: Final answer
    x = 1,312.36

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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.