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Finding the Fourth Proportional to 320,810.60, 481,215.90 and 291,286.10

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Solution

The fourth proportional to 320,810.60, 481,215.90 and 291,286.10 is: 436,929.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,810.60 : 481,215.90 = 291,286.10 : x
  2. Step 2: Convert to fraction form
    320,810.60/481,215.90 = 291,286.10/x
  3. Step 3: Cross multiply
    320,810.60x = 481,215.90 × 291,286.10
  4. Step 4: Simplify right side
    320,810.60x = 140,171,502,768.99
  5. Step 5: Solve for x
    x = 140,171,502,768.99/320,810.60
  6. Step 6: Final answer
    x = 436,929.15

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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.