Home / 2,979.84-4,109.76-1,931.52

Finding the Fourth Proportional to 2,979.84, 4,109.76 and 1,931.52

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Solution

The fourth proportional to 2,979.84, 4,109.76 and 1,931.52 is: 2,663.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.84 : 4,109.76 = 1,931.52 : x
  2. Step 2: Convert to fraction form
    2,979.84/4,109.76 = 1,931.52/x
  3. Step 3: Cross multiply
    2,979.84x = 4,109.76 × 1,931.52
  4. Step 4: Simplify right side
    2,979.84x = 7,938,083.64
  5. Step 5: Solve for x
    x = 7,938,083.64/2,979.84
  6. Step 6: Final answer
    x = 2,663.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.