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Finding the Fourth Proportional to 1,807,947.60, 2,708,855.64 and 1,200,310.80

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Solution

The fourth proportional to 1,807,947.60, 2,708,855.64 and 1,200,310.80 is: 1,798,430.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807,947.60 : 2,708,855.64 = 1,200,310.80 : x
  2. Step 2: Convert to fraction form
    1,807,947.60/2,708,855.64 = 1,200,310.80/x
  3. Step 3: Cross multiply
    1,807,947.60x = 2,708,855.64 × 1,200,310.80
  4. Step 4: Simplify right side
    1,807,947.60x = 3,251,468,680,332.91
  5. Step 5: Solve for x
    x = 3,251,468,680,332.91/1,807,947.60
  6. Step 6: Final answer
    x = 1,798,430.82

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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.