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Finding the Fourth Proportional to 986,569.80, 1,479,854.70 and 455,128.80

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Solution

The fourth proportional to 986,569.80, 1,479,854.70 and 455,128.80 is: 682,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,569.80 : 1,479,854.70 = 455,128.80 : x
  2. Step 2: Convert to fraction form
    986,569.80/1,479,854.70 = 455,128.80/x
  3. Step 3: Cross multiply
    986,569.80x = 1,479,854.70 × 455,128.80
  4. Step 4: Simplify right side
    986,569.80x = 673,524,493,785.36
  5. Step 5: Solve for x
    x = 673,524,493,785.36/986,569.80
  6. Step 6: Final answer
    x = 682,693.20

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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.