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Finding the Fourth Proportional to 343,142.80, 514,778.96 and 129,974.56

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Solution

The fourth proportional to 343,142.80, 514,778.96 and 129,974.56 is: 194,986.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,142.80 : 514,778.96 = 129,974.56 : x
  2. Step 2: Convert to fraction form
    343,142.80/514,778.96 = 129,974.56/x
  3. Step 3: Cross multiply
    343,142.80x = 514,778.96 × 129,974.56
  4. Step 4: Simplify right side
    343,142.80x = 66,908,167,861.25
  5. Step 5: Solve for x
    x = 66,908,167,861.25/343,142.80
  6. Step 6: Final answer
    x = 194,986.37

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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.