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Finding the Fourth Proportional to 1,981,458.90, 2,971,251.45 and 767,604.06

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Solution

The fourth proportional to 1,981,458.90, 2,971,251.45 and 767,604.06 is: 1,151,043.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981,458.90 : 2,971,251.45 = 767,604.06 : x
  2. Step 2: Convert to fraction form
    1,981,458.90/2,971,251.45 = 767,604.06/x
  3. Step 3: Cross multiply
    1,981,458.90x = 2,971,251.45 × 767,604.06
  4. Step 4: Simplify right side
    1,981,458.90x = 2,280,744,676,300.89
  5. Step 5: Solve for x
    x = 2,280,744,676,300.89/1,981,458.90
  6. Step 6: Final answer
    x = 1,151,043.14

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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.