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Finding the Fourth Proportional to 1,257.51, 1,737.45 and 993.97

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Solution

The fourth proportional to 1,257.51, 1,737.45 and 993.97 is: 1,373.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.51 : 1,737.45 = 993.97 : x
  2. Step 2: Convert to fraction form
    1,257.51/1,737.45 = 993.97/x
  3. Step 3: Cross multiply
    1,257.51x = 1,737.45 × 993.97
  4. Step 4: Simplify right side
    1,257.51x = 1,726,975.35
  5. Step 5: Solve for x
    x = 1,726,975.35/1,257.51
  6. Step 6: Final answer
    x = 1,373.33

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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.