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Finding the Fourth Proportional to 1,273.80, 1,911.48 and 697.08

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Solution

The fourth proportional to 1,273.80, 1,911.48 and 697.08 is: 1,046.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.80 : 1,911.48 = 697.08 : x
  2. Step 2: Convert to fraction form
    1,273.80/1,911.48 = 697.08/x
  3. Step 3: Cross multiply
    1,273.80x = 1,911.48 × 697.08
  4. Step 4: Simplify right side
    1,273.80x = 1,332,454.48
  5. Step 5: Solve for x
    x = 1,332,454.48/1,273.80
  6. Step 6: Final answer
    x = 1,046.05

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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.