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Finding the Fourth Proportional to 962.36, 1,440.72 and 869.48

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Solution

The fourth proportional to 962.36, 1,440.72 and 869.48 is: 1,301.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.36 : 1,440.72 = 869.48 : x
  2. Step 2: Convert to fraction form
    962.36/1,440.72 = 869.48/x
  3. Step 3: Cross multiply
    962.36x = 1,440.72 × 869.48
  4. Step 4: Simplify right side
    962.36x = 1,252,677.23
  5. Step 5: Solve for x
    x = 1,252,677.23/962.36
  6. Step 6: Final answer
    x = 1,301.67

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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.