Home / 981,312.80-1,471,969.20-815,424.80

Finding the Fourth Proportional to 981,312.80, 1,471,969.20 and 815,424.80

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Solution

The fourth proportional to 981,312.80, 1,471,969.20 and 815,424.80 is: 1,223,137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,312.80 : 1,471,969.20 = 815,424.80 : x
  2. Step 2: Convert to fraction form
    981,312.80/1,471,969.20 = 815,424.80/x
  3. Step 3: Cross multiply
    981,312.80x = 1,471,969.20 × 815,424.80
  4. Step 4: Simplify right side
    981,312.80x = 1,200,280,190,516.16
  5. Step 5: Solve for x
    x = 1,200,280,190,516.16/981,312.80
  6. Step 6: Final answer
    x = 1,223,137.20

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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.