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Finding the Fourth Proportional to 289,019.88, 398,839.19 and 159,963.65

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Solution

The fourth proportional to 289,019.88, 398,839.19 and 159,963.65 is: 220,745.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,019.88 : 398,839.19 = 159,963.65 : x
  2. Step 2: Convert to fraction form
    289,019.88/398,839.19 = 159,963.65/x
  3. Step 3: Cross multiply
    289,019.88x = 398,839.19 × 159,963.65
  4. Step 4: Simplify right side
    289,019.88x = 63,799,772,595.44
  5. Step 5: Solve for x
    x = 63,799,772,595.44/289,019.88
  6. Step 6: Final answer
    x = 220,745.27

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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.