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Finding the Fourth Proportional to 260,755.28, 391,070.28 and 120,379.04

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Solution

The fourth proportional to 260,755.28, 391,070.28 and 120,379.04 is: 180,539.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,755.28 : 391,070.28 = 120,379.04 : x
  2. Step 2: Convert to fraction form
    260,755.28/391,070.28 = 120,379.04/x
  3. Step 3: Cross multiply
    260,755.28x = 391,070.28 × 120,379.04
  4. Step 4: Simplify right side
    260,755.28x = 47,076,664,878.93
  5. Step 5: Solve for x
    x = 47,076,664,878.93/260,755.28
  6. Step 6: Final answer
    x = 180,539.64

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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.