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Finding the Fourth Proportional to 2,778.61, 4,167 and 929.23

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Solution

The fourth proportional to 2,778.61, 4,167 and 929.23 is: 1,393.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.61 : 4,167 = 929.23 : x
  2. Step 2: Convert to fraction form
    2,778.61/4,167 = 929.23/x
  3. Step 3: Cross multiply
    2,778.61x = 4,167 × 929.23
  4. Step 4: Simplify right side
    2,778.61x = 3,872,101.41
  5. Step 5: Solve for x
    x = 3,872,101.41/2,778.61
  6. Step 6: Final answer
    x = 1,393.54

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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.