Home / 1,979.95-2,732.33-1,140.70

Finding the Fourth Proportional to 1,979.95, 2,732.33 and 1,140.70

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Solution

The fourth proportional to 1,979.95, 2,732.33 and 1,140.70 is: 1,574.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.95 : 2,732.33 = 1,140.70 : x
  2. Step 2: Convert to fraction form
    1,979.95/2,732.33 = 1,140.70/x
  3. Step 3: Cross multiply
    1,979.95x = 2,732.33 × 1,140.70
  4. Step 4: Simplify right side
    1,979.95x = 3,116,768.83
  5. Step 5: Solve for x
    x = 3,116,768.83/1,979.95
  6. Step 6: Final answer
    x = 1,574.17

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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.