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Finding the Fourth Proportional to 1,281,976.65, 1,769,672.49 and 798,780.51

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Solution

The fourth proportional to 1,281,976.65, 1,769,672.49 and 798,780.51 is: 1,102,656.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,976.65 : 1,769,672.49 = 798,780.51 : x
  2. Step 2: Convert to fraction form
    1,281,976.65/1,769,672.49 = 798,780.51/x
  3. Step 3: Cross multiply
    1,281,976.65x = 1,769,672.49 × 798,780.51
  4. Step 4: Simplify right side
    1,281,976.65x = 1,413,579,894,095.17
  5. Step 5: Solve for x
    x = 1,413,579,894,095.17/1,281,976.65
  6. Step 6: Final answer
    x = 1,102,656.51

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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.