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Finding the Fourth Proportional to 260,732.80, 391,574.40 and 155,756.80

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Solution

The fourth proportional to 260,732.80, 391,574.40 and 155,756.80 is: 233,919.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,732.80 : 391,574.40 = 155,756.80 : x
  2. Step 2: Convert to fraction form
    260,732.80/391,574.40 = 155,756.80/x
  3. Step 3: Cross multiply
    260,732.80x = 391,574.40 × 155,756.80
  4. Step 4: Simplify right side
    260,732.80x = 60,990,375,505.92
  5. Step 5: Solve for x
    x = 60,990,375,505.92/260,732.80
  6. Step 6: Final answer
    x = 233,919.08

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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.