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Finding the Fourth Proportional to 1,541.90, 2,313.15 and 664.40

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Solution

The fourth proportional to 1,541.90, 2,313.15 and 664.40 is: 996.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.90 : 2,313.15 = 664.40 : x
  2. Step 2: Convert to fraction form
    1,541.90/2,313.15 = 664.40/x
  3. Step 3: Cross multiply
    1,541.90x = 2,313.15 × 664.40
  4. Step 4: Simplify right side
    1,541.90x = 1,536,856.86
  5. Step 5: Solve for x
    x = 1,536,856.86/1,541.90
  6. Step 6: Final answer
    x = 996.73

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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.