Home / 280,020.47-386,414.25-159,145.79

Finding the Fourth Proportional to 280,020.47, 386,414.25 and 159,145.79

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Solution

The fourth proportional to 280,020.47, 386,414.25 and 159,145.79 is: 219,613.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,020.47 : 386,414.25 = 159,145.79 : x
  2. Step 2: Convert to fraction form
    280,020.47/386,414.25 = 159,145.79/x
  3. Step 3: Cross multiply
    280,020.47x = 386,414.25 × 159,145.79
  4. Step 4: Simplify right side
    280,020.47x = 61,496,201,083.51
  5. Step 5: Solve for x
    x = 61,496,201,083.51/280,020.47
  6. Step 6: Final answer
    x = 219,613.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.