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Finding the Fourth Proportional to 260,812.80, 391,222.08 and 83,318.40

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Solution

The fourth proportional to 260,812.80, 391,222.08 and 83,318.40 is: 124,978.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,812.80 : 391,222.08 = 83,318.40 : x
  2. Step 2: Convert to fraction form
    260,812.80/391,222.08 = 83,318.40/x
  3. Step 3: Cross multiply
    260,812.80x = 391,222.08 × 83,318.40
  4. Step 4: Simplify right side
    260,812.80x = 32,595,997,750.27
  5. Step 5: Solve for x
    x = 32,595,997,750.27/260,812.80
  6. Step 6: Final answer
    x = 124,978.52

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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.