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Finding the Fourth Proportional to 339,740.70, 509,611.05 and 261,251.10

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Solution

The fourth proportional to 339,740.70, 509,611.05 and 261,251.10 is: 391,876.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,740.70 : 509,611.05 = 261,251.10 : x
  2. Step 2: Convert to fraction form
    339,740.70/509,611.05 = 261,251.10/x
  3. Step 3: Cross multiply
    339,740.70x = 509,611.05 × 261,251.10
  4. Step 4: Simplify right side
    339,740.70x = 133,136,447,384.66
  5. Step 5: Solve for x
    x = 133,136,447,384.66/339,740.70
  6. Step 6: Final answer
    x = 391,876.65

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Similar ratio
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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.