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Finding the Fourth Proportional to 3,391.74, 5,086.95 and 925.98

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Solution

The fourth proportional to 3,391.74, 5,086.95 and 925.98 is: 1,388.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.74 : 5,086.95 = 925.98 : x
  2. Step 2: Convert to fraction form
    3,391.74/5,086.95 = 925.98/x
  3. Step 3: Cross multiply
    3,391.74x = 5,086.95 × 925.98
  4. Step 4: Simplify right side
    3,391.74x = 4,710,391.41
  5. Step 5: Solve for x
    x = 4,710,391.41/3,391.74
  6. Step 6: Final answer
    x = 1,388.78

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1.5x scale

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.