Home / 513,318.60-769,103.10-438,085.80

Finding the Fourth Proportional to 513,318.60, 769,103.10 and 438,085.80

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Solution

The fourth proportional to 513,318.60, 769,103.10 and 438,085.80 is: 656,382.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,318.60 : 769,103.10 = 438,085.80 : x
  2. Step 2: Convert to fraction form
    513,318.60/769,103.10 = 438,085.80/x
  3. Step 3: Cross multiply
    513,318.60x = 769,103.10 × 438,085.80
  4. Step 4: Simplify right side
    513,318.60x = 336,933,146,845.98
  5. Step 5: Solve for x
    x = 336,933,146,845.98/513,318.60
  6. Step 6: Final answer
    x = 656,382.11

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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.