Home / 1,970.10-2,718.68-1,085.90

Finding the Fourth Proportional to 1,970.10, 2,718.68 and 1,085.90

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Solution

The fourth proportional to 1,970.10, 2,718.68 and 1,085.90 is: 1,498.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.10 : 2,718.68 = 1,085.90 : x
  2. Step 2: Convert to fraction form
    1,970.10/2,718.68 = 1,085.90/x
  3. Step 3: Cross multiply
    1,970.10x = 2,718.68 × 1,085.90
  4. Step 4: Simplify right side
    1,970.10x = 2,952,195.59
  5. Step 5: Solve for x
    x = 2,952,195.59/1,970.10
  6. Step 6: Final answer
    x = 1,498.50

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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.