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Finding the Fourth Proportional to 1,667.88, 2,502 and 938.88

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Solution

The fourth proportional to 1,667.88, 2,502 and 938.88 is: 1,408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,667.88 : 2,502 = 938.88 : x
  2. Step 2: Convert to fraction form
    1,667.88/2,502 = 938.88/x
  3. Step 3: Cross multiply
    1,667.88x = 2,502 × 938.88
  4. Step 4: Simplify right side
    1,667.88x = 2,349,077.76
  5. Step 5: Solve for x
    x = 2,349,077.76/1,667.88
  6. Step 6: Final answer
    x = 1,408.42

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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.