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Finding the Fourth Proportional to 1,273.41, 1,909.81 and 348.72

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Solution

The fourth proportional to 1,273.41, 1,909.81 and 348.72 is: 523.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.41 : 1,909.81 = 348.72 : x
  2. Step 2: Convert to fraction form
    1,273.41/1,909.81 = 348.72/x
  3. Step 3: Cross multiply
    1,273.41x = 1,909.81 × 348.72
  4. Step 4: Simplify right side
    1,273.41x = 665,996.25
  5. Step 5: Solve for x
    x = 665,996.25/1,273.41
  6. Step 6: Final answer
    x = 523.00

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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.