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Finding the Fourth Proportional to 871.67, 1,307.45 and 734.48

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Solution

The fourth proportional to 871.67, 1,307.45 and 734.48 is: 1,101.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.67 : 1,307.45 = 734.48 : x
  2. Step 2: Convert to fraction form
    871.67/1,307.45 = 734.48/x
  3. Step 3: Cross multiply
    871.67x = 1,307.45 × 734.48
  4. Step 4: Simplify right side
    871.67x = 960,291.17
  5. Step 5: Solve for x
    x = 960,291.17/871.67
  6. Step 6: Final answer
    x = 1,101.67

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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.