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Finding the Fourth Proportional to 880,815.60, 1,321,223.40 and 728,600.40

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Solution

The fourth proportional to 880,815.60, 1,321,223.40 and 728,600.40 is: 1,092,900.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,815.60 : 1,321,223.40 = 728,600.40 : x
  2. Step 2: Convert to fraction form
    880,815.60/1,321,223.40 = 728,600.40/x
  3. Step 3: Cross multiply
    880,815.60x = 1,321,223.40 × 728,600.40
  4. Step 4: Simplify right side
    880,815.60x = 962,643,897,729.36
  5. Step 5: Solve for x
    x = 962,643,897,729.36/880,815.60
  6. Step 6: Final answer
    x = 1,092,900.60

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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.