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Finding the Fourth Proportional to 981,256.80, 1,470,718.80 and 412,636.80

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Solution

The fourth proportional to 981,256.80, 1,470,718.80 and 412,636.80 is: 618,464.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,256.80 : 1,470,718.80 = 412,636.80 : x
  2. Step 2: Convert to fraction form
    981,256.80/1,470,718.80 = 412,636.80/x
  3. Step 3: Cross multiply
    981,256.80x = 1,470,718.80 × 412,636.80
  4. Step 4: Simplify right side
    981,256.80x = 606,872,699,331.84
  5. Step 5: Solve for x
    x = 606,872,699,331.84/981,256.80
  6. Step 6: Final answer
    x = 618,464.71

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1.5x scale

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.