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Finding the Fourth Proportional to 1,940.66, 2,911.76 and 708.15

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Solution

The fourth proportional to 1,940.66, 2,911.76 and 708.15 is: 1,062.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.66 : 2,911.76 = 708.15 : x
  2. Step 2: Convert to fraction form
    1,940.66/2,911.76 = 708.15/x
  3. Step 3: Cross multiply
    1,940.66x = 2,911.76 × 708.15
  4. Step 4: Simplify right side
    1,940.66x = 2,061,962.84
  5. Step 5: Solve for x
    x = 2,061,962.84/1,940.66
  6. Step 6: Final answer
    x = 1,062.51

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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.