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Finding the Fourth Proportional to 1,593.56, 2,387 and 811.20

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Solution

The fourth proportional to 1,593.56, 2,387 and 811.20 is: 1,215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,593.56 : 2,387 = 811.20 : x
  2. Step 2: Convert to fraction form
    1,593.56/2,387 = 811.20/x
  3. Step 3: Cross multiply
    1,593.56x = 2,387 × 811.20
  4. Step 4: Simplify right side
    1,593.56x = 1,936,334.40
  5. Step 5: Solve for x
    x = 1,936,334.40/1,593.56
  6. Step 6: Final answer
    x = 1,215.10

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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.