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Finding the Fourth Proportional to 1,273.39, 1,754.89 and 993.18

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Solution

The fourth proportional to 1,273.39, 1,754.89 and 993.18 is: 1,368.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.39 : 1,754.89 = 993.18 : x
  2. Step 2: Convert to fraction form
    1,273.39/1,754.89 = 993.18/x
  3. Step 3: Cross multiply
    1,273.39x = 1,754.89 × 993.18
  4. Step 4: Simplify right side
    1,273.39x = 1,742,912.88
  5. Step 5: Solve for x
    x = 1,742,912.88/1,273.39
  6. Step 6: Final answer
    x = 1,368.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.