Home / 280,492.20-387,081.36-159,642.72

Finding the Fourth Proportional to 280,492.20, 387,081.36 and 159,642.72

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Solution

The fourth proportional to 280,492.20, 387,081.36 and 159,642.72 is: 220,308.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,492.20 : 387,081.36 = 159,642.72 : x
  2. Step 2: Convert to fraction form
    280,492.20/387,081.36 = 159,642.72/x
  3. Step 3: Cross multiply
    280,492.20x = 387,081.36 × 159,642.72
  4. Step 4: Simplify right side
    280,492.20x = 61,794,721,171.70
  5. Step 5: Solve for x
    x = 61,794,721,171.70/280,492.20
  6. Step 6: Final answer
    x = 220,308.16

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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.