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Finding the Fourth Proportional to 866,806.40, 1,299,691.20 and 446,902.40

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Solution

The fourth proportional to 866,806.40, 1,299,691.20 and 446,902.40 is: 670,086.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,806.40 : 1,299,691.20 = 446,902.40 : x
  2. Step 2: Convert to fraction form
    866,806.40/1,299,691.20 = 446,902.40/x
  3. Step 3: Cross multiply
    866,806.40x = 1,299,691.20 × 446,902.40
  4. Step 4: Simplify right side
    866,806.40x = 580,835,116,538.88
  5. Step 5: Solve for x
    x = 580,835,116,538.88/866,806.40
  6. Step 6: Final answer
    x = 670,086.33

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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.