Home / 280,128.72-386,568.90-159,283.20

Finding the Fourth Proportional to 280,128.72, 386,568.90 and 159,283.20

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Solution

The fourth proportional to 280,128.72, 386,568.90 and 159,283.20 is: 219,805.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,128.72 : 386,568.90 = 159,283.20 : x
  2. Step 2: Convert to fraction form
    280,128.72/386,568.90 = 159,283.20/x
  3. Step 3: Cross multiply
    280,128.72x = 386,568.90 × 159,283.20
  4. Step 4: Simplify right side
    280,128.72x = 61,573,931,412.48
  5. Step 5: Solve for x
    x = 61,573,931,412.48/280,128.72
  6. Step 6: Final answer
    x = 219,805.85

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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.