Home / 1,988,789.64-2,744,449.32-1,215,715.20

Finding the Fourth Proportional to 1,988,789.64, 2,744,449.32 and 1,215,715.20

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Solution

The fourth proportional to 1,988,789.64, 2,744,449.32 and 1,215,715.20 is: 1,677,637.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988,789.64 : 2,744,449.32 = 1,215,715.20 : x
  2. Step 2: Convert to fraction form
    1,988,789.64/2,744,449.32 = 1,215,715.20/x
  3. Step 3: Cross multiply
    1,988,789.64x = 2,744,449.32 × 1,215,715.20
  4. Step 4: Simplify right side
    1,988,789.64x = 3,336,468,753,953.66
  5. Step 5: Solve for x
    x = 3,336,468,753,953.66/1,988,789.64
  6. Step 6: Final answer
    x = 1,677,637.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.