Home / 1,938.42-2,908.14-551.76

Finding the Fourth Proportional to 1,938.42, 2,908.14 and 551.76

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Solution

The fourth proportional to 1,938.42, 2,908.14 and 551.76 is: 827.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.42 : 2,908.14 = 551.76 : x
  2. Step 2: Convert to fraction form
    1,938.42/2,908.14 = 551.76/x
  3. Step 3: Cross multiply
    1,938.42x = 2,908.14 × 551.76
  4. Step 4: Simplify right side
    1,938.42x = 1,604,595.33
  5. Step 5: Solve for x
    x = 1,604,595.33/1,938.42
  6. Step 6: Final answer
    x = 827.79

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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.