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Finding the Fourth Proportional to 1,397.25, 2,095.60 and 693.73

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Solution

The fourth proportional to 1,397.25, 2,095.60 and 693.73 is: 1,040.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.25 : 2,095.60 = 693.73 : x
  2. Step 2: Convert to fraction form
    1,397.25/2,095.60 = 693.73/x
  3. Step 3: Cross multiply
    1,397.25x = 2,095.60 × 693.73
  4. Step 4: Simplify right side
    1,397.25x = 1,453,768.38
  5. Step 5: Solve for x
    x = 1,453,768.38/1,397.25
  6. Step 6: Final answer
    x = 1,040.45

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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.