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Finding the Fourth Proportional to 543,907.31, 815,860.96 and 206,870.10

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Solution

The fourth proportional to 543,907.31, 815,860.96 and 206,870.10 is: 310,305.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,907.31 : 815,860.96 = 206,870.10 : x
  2. Step 2: Convert to fraction form
    543,907.31/815,860.96 = 206,870.10/x
  3. Step 3: Cross multiply
    543,907.31x = 815,860.96 × 206,870.10
  4. Step 4: Simplify right side
    543,907.31x = 168,777,238,381.30
  5. Step 5: Solve for x
    x = 168,777,238,381.30/543,907.31
  6. Step 6: Final answer
    x = 310,305.15

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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.