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Finding the Fourth Proportional to 260,779.20, 391,168.80 and 73,790.70

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Solution

The fourth proportional to 260,779.20, 391,168.80 and 73,790.70 is: 110,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,779.20 : 391,168.80 = 73,790.70 : x
  2. Step 2: Convert to fraction form
    260,779.20/391,168.80 = 73,790.70/x
  3. Step 3: Cross multiply
    260,779.20x = 391,168.80 × 73,790.70
  4. Step 4: Simplify right side
    260,779.20x = 28,864,619,570.16
  5. Step 5: Solve for x
    x = 28,864,619,570.16/260,779.20
  6. Step 6: Final answer
    x = 110,686.05

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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.