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Finding the Fourth Proportional to 1,855,612.80, 2,781,799.20 and 719,150.40

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Solution

The fourth proportional to 1,855,612.80, 2,781,799.20 and 719,150.40 is: 1,078,097.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855,612.80 : 2,781,799.20 = 719,150.40 : x
  2. Step 2: Convert to fraction form
    1,855,612.80/2,781,799.20 = 719,150.40/x
  3. Step 3: Cross multiply
    1,855,612.80x = 2,781,799.20 × 719,150.40
  4. Step 4: Simplify right side
    1,855,612.80x = 2,000,532,007,399.68
  5. Step 5: Solve for x
    x = 2,000,532,007,399.68/1,855,612.80
  6. Step 6: Final answer
    x = 1,078,097.76

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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.