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Finding the Fourth Proportional to 543,679.40, 815,519.10 and 344,881.10

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Solution

The fourth proportional to 543,679.40, 815,519.10 and 344,881.10 is: 517,321.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,679.40 : 815,519.10 = 344,881.10 : x
  2. Step 2: Convert to fraction form
    543,679.40/815,519.10 = 344,881.10/x
  3. Step 3: Cross multiply
    543,679.40x = 815,519.10 × 344,881.10
  4. Step 4: Simplify right side
    543,679.40x = 281,257,124,279.01
  5. Step 5: Solve for x
    x = 281,257,124,279.01/543,679.40
  6. Step 6: Final answer
    x = 517,321.65

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Double scale
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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.