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Finding the Fourth Proportional to 1,077,982.80, 1,616,974.20 and 840,037.20

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Solution

The fourth proportional to 1,077,982.80, 1,616,974.20 and 840,037.20 is: 1,260,055.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077,982.80 : 1,616,974.20 = 840,037.20 : x
  2. Step 2: Convert to fraction form
    1,077,982.80/1,616,974.20 = 840,037.20/x
  3. Step 3: Cross multiply
    1,077,982.80x = 1,616,974.20 × 840,037.20
  4. Step 4: Simplify right side
    1,077,982.80x = 1,358,318,479,440.24
  5. Step 5: Solve for x
    x = 1,358,318,479,440.24/1,077,982.80
  6. Step 6: Final answer
    x = 1,260,055.80

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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.