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Finding the Fourth Proportional to 1,593.12, 2,390.10 and 668.76

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Solution

The fourth proportional to 1,593.12, 2,390.10 and 668.76 is: 1,003.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,593.12 : 2,390.10 = 668.76 : x
  2. Step 2: Convert to fraction form
    1,593.12/2,390.10 = 668.76/x
  3. Step 3: Cross multiply
    1,593.12x = 2,390.10 × 668.76
  4. Step 4: Simplify right side
    1,593.12x = 1,598,403.28
  5. Step 5: Solve for x
    x = 1,598,403.28/1,593.12
  6. Step 6: Final answer
    x = 1,003.32

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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.