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Finding the Fourth Proportional to 261,003.80, 391,505.70 and 248,756.60

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Solution

The fourth proportional to 261,003.80, 391,505.70 and 248,756.60 is: 373,134.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,003.80 : 391,505.70 = 248,756.60 : x
  2. Step 2: Convert to fraction form
    261,003.80/391,505.70 = 248,756.60/x
  3. Step 3: Cross multiply
    261,003.80x = 391,505.70 × 248,756.60
  4. Step 4: Simplify right side
    261,003.80x = 97,389,626,812.62
  5. Step 5: Solve for x
    x = 97,389,626,812.62/261,003.80
  6. Step 6: Final answer
    x = 373,134.90

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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.