Home / 2,980.71-4,111.67-1,859.70

Finding the Fourth Proportional to 2,980.71, 4,111.67 and 1,859.70

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Solution

The fourth proportional to 2,980.71, 4,111.67 and 1,859.70 is: 2,565.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.71 : 4,111.67 = 1,859.70 : x
  2. Step 2: Convert to fraction form
    2,980.71/4,111.67 = 1,859.70/x
  3. Step 3: Cross multiply
    2,980.71x = 4,111.67 × 1,859.70
  4. Step 4: Simplify right side
    2,980.71x = 7,646,472.70
  5. Step 5: Solve for x
    x = 7,646,472.70/2,980.71
  6. Step 6: Final answer
    x = 2,565.32

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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.