Home / 821,112.80-1,231,660.65-260,147.30

Finding the Fourth Proportional to 821,112.80, 1,231,660.65 and 260,147.30

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Solution

The fourth proportional to 821,112.80, 1,231,660.65 and 260,147.30 is: 390,218.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,112.80 : 1,231,660.65 = 260,147.30 : x
  2. Step 2: Convert to fraction form
    821,112.80/1,231,660.65 = 260,147.30/x
  3. Step 3: Cross multiply
    821,112.80x = 1,231,660.65 × 260,147.30
  4. Step 4: Simplify right side
    821,112.80x = 320,413,192,613.75
  5. Step 5: Solve for x
    x = 320,413,192,613.75/821,112.80
  6. Step 6: Final answer
    x = 390,218.24

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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.