Home / 1,992,937.20-2,989,405.80-1,981,127.40

Finding the Fourth Proportional to 1,992,937.20, 2,989,405.80 and 1,981,127.40

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Solution

The fourth proportional to 1,992,937.20, 2,989,405.80 and 1,981,127.40 is: 2,971,691.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992,937.20 : 2,989,405.80 = 1,981,127.40 : x
  2. Step 2: Convert to fraction form
    1,992,937.20/2,989,405.80 = 1,981,127.40/x
  3. Step 3: Cross multiply
    1,992,937.20x = 2,989,405.80 × 1,981,127.40
  4. Step 4: Simplify right side
    1,992,937.20x = 5,922,393,740,098.92
  5. Step 5: Solve for x
    x = 5,922,393,740,098.92/1,992,937.20
  6. Step 6: Final answer
    x = 2,971,691.10

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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.