Home / 1,938.80-2,908.18-477.95

Finding the Fourth Proportional to 1,938.80, 2,908.18 and 477.95

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Solution

The fourth proportional to 1,938.80, 2,908.18 and 477.95 is: 716.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.80 : 2,908.18 = 477.95 : x
  2. Step 2: Convert to fraction form
    1,938.80/2,908.18 = 477.95/x
  3. Step 3: Cross multiply
    1,938.80x = 2,908.18 × 477.95
  4. Step 4: Simplify right side
    1,938.80x = 1,389,965.70
  5. Step 5: Solve for x
    x = 1,389,965.70/1,938.80
  6. Step 6: Final answer
    x = 716.92

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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.