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Finding the Fourth Proportional to 964.49, 1,447.88 and 812.34

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Solution

The fourth proportional to 964.49, 1,447.88 and 812.34 is: 1,219.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.49 : 1,447.88 = 812.34 : x
  2. Step 2: Convert to fraction form
    964.49/1,447.88 = 812.34/x
  3. Step 3: Cross multiply
    964.49x = 1,447.88 × 812.34
  4. Step 4: Simplify right side
    964.49x = 1,176,166.78
  5. Step 5: Solve for x
    x = 1,176,166.78/964.49
  6. Step 6: Final answer
    x = 1,219.48

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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.