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Finding the Fourth Proportional to 260,838.80, 391,258.20 and 154,113.20

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Solution

The fourth proportional to 260,838.80, 391,258.20 and 154,113.20 is: 231,169.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,838.80 : 391,258.20 = 154,113.20 : x
  2. Step 2: Convert to fraction form
    260,838.80/391,258.20 = 154,113.20/x
  3. Step 3: Cross multiply
    260,838.80x = 391,258.20 × 154,113.20
  4. Step 4: Simplify right side
    260,838.80x = 60,298,053,228.24
  5. Step 5: Solve for x
    x = 60,298,053,228.24/260,838.80
  6. Step 6: Final answer
    x = 231,169.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.