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Finding the Fourth Proportional to 2,440.86, 3,661.42 and 661.90

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Solution

The fourth proportional to 2,440.86, 3,661.42 and 661.90 is: 992.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,440.86 : 3,661.42 = 661.90 : x
  2. Step 2: Convert to fraction form
    2,440.86/3,661.42 = 661.90/x
  3. Step 3: Cross multiply
    2,440.86x = 3,661.42 × 661.90
  4. Step 4: Simplify right side
    2,440.86x = 2,423,493.90
  5. Step 5: Solve for x
    x = 2,423,493.90/2,440.86
  6. Step 6: Final answer
    x = 992.89

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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.