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Finding the Fourth Proportional to 543,905.31, 815,857.96 and 206,868.10

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Solution

The fourth proportional to 543,905.31, 815,857.96 and 206,868.10 is: 310,302.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,905.31 : 815,857.96 = 206,868.10 : x
  2. Step 2: Convert to fraction form
    543,905.31/815,857.96 = 206,868.10/x
  3. Step 3: Cross multiply
    543,905.31x = 815,857.96 × 206,868.10
  4. Step 4: Simplify right side
    543,905.31x = 168,774,987,419.56
  5. Step 5: Solve for x
    x = 168,774,987,419.56/543,905.31
  6. Step 6: Final answer
    x = 310,302.15

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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.