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Finding the Fourth Proportional to 1,375.84, 1,897.86 and 903.81

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Solution

The fourth proportional to 1,375.84, 1,897.86 and 903.81 is: 1,246.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.84 : 1,897.86 = 903.81 : x
  2. Step 2: Convert to fraction form
    1,375.84/1,897.86 = 903.81/x
  3. Step 3: Cross multiply
    1,375.84x = 1,897.86 × 903.81
  4. Step 4: Simplify right side
    1,375.84x = 1,715,304.85
  5. Step 5: Solve for x
    x = 1,715,304.85/1,375.84
  6. Step 6: Final answer
    x = 1,246.73

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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.