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Finding the Fourth Proportional to 260,313.20, 390,469.80 and 155,250.80

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Solution

The fourth proportional to 260,313.20, 390,469.80 and 155,250.80 is: 232,876.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,313.20 : 390,469.80 = 155,250.80 : x
  2. Step 2: Convert to fraction form
    260,313.20/390,469.80 = 155,250.80/x
  3. Step 3: Cross multiply
    260,313.20x = 390,469.80 × 155,250.80
  4. Step 4: Simplify right side
    260,313.20x = 60,620,748,825.84
  5. Step 5: Solve for x
    x = 60,620,748,825.84/260,313.20
  6. Step 6: Final answer
    x = 232,876.20

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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.