Home / 543,758.20-815,637.30-319,226.20

Finding the Fourth Proportional to 543,758.20, 815,637.30 and 319,226.20

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Solution

The fourth proportional to 543,758.20, 815,637.30 and 319,226.20 is: 478,839.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,758.20 : 815,637.30 = 319,226.20 : x
  2. Step 2: Convert to fraction form
    543,758.20/815,637.30 = 319,226.20/x
  3. Step 3: Cross multiply
    543,758.20x = 815,637.30 × 319,226.20
  4. Step 4: Simplify right side
    543,758.20x = 260,372,795,857.26
  5. Step 5: Solve for x
    x = 260,372,795,857.26/543,758.20
  6. Step 6: Final answer
    x = 478,839.30

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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.