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Finding the Fourth Proportional to 260,824.80, 391,237.20 and 120,856.80

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Solution

The fourth proportional to 260,824.80, 391,237.20 and 120,856.80 is: 181,285.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,824.80 : 391,237.20 = 120,856.80 : x
  2. Step 2: Convert to fraction form
    260,824.80/391,237.20 = 120,856.80/x
  3. Step 3: Cross multiply
    260,824.80x = 391,237.20 × 120,856.80
  4. Step 4: Simplify right side
    260,824.80x = 47,283,676,032.96
  5. Step 5: Solve for x
    x = 47,283,676,032.96/260,824.80
  6. Step 6: Final answer
    x = 181,285.20

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1.5x scale

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.