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Finding the Fourth Proportional to 878,611.40, 1,317,042.30 and 404,469.80

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Solution

The fourth proportional to 878,611.40, 1,317,042.30 and 404,469.80 is: 606,301.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,611.40 : 1,317,042.30 = 404,469.80 : x
  2. Step 2: Convert to fraction form
    878,611.40/1,317,042.30 = 404,469.80/x
  3. Step 3: Cross multiply
    878,611.40x = 1,317,042.30 × 404,469.80
  4. Step 4: Simplify right side
    878,611.40x = 532,703,835,672.54
  5. Step 5: Solve for x
    x = 532,703,835,672.54/878,611.40
  6. Step 6: Final answer
    x = 606,301.98

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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.