Home / 287,299.28-396,479.40-159,986.72

Finding the Fourth Proportional to 287,299.28, 396,479.40 and 159,986.72

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Solution

The fourth proportional to 287,299.28, 396,479.40 and 159,986.72 is: 220,785.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,299.28 : 396,479.40 = 159,986.72 : x
  2. Step 2: Convert to fraction form
    287,299.28/396,479.40 = 159,986.72/x
  3. Step 3: Cross multiply
    287,299.28x = 396,479.40 × 159,986.72
  4. Step 4: Simplify right side
    287,299.28x = 63,431,438,753.57
  5. Step 5: Solve for x
    x = 63,431,438,753.57/287,299.28
  6. Step 6: Final answer
    x = 220,785.23

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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.