Home / 2,085.74-2,878.70-1,340.63

Finding the Fourth Proportional to 2,085.74, 2,878.70 and 1,340.63

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Solution

The fourth proportional to 2,085.74, 2,878.70 and 1,340.63 is: 1,850.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.74 : 2,878.70 = 1,340.63 : x
  2. Step 2: Convert to fraction form
    2,085.74/2,878.70 = 1,340.63/x
  3. Step 3: Cross multiply
    2,085.74x = 2,878.70 × 1,340.63
  4. Step 4: Simplify right side
    2,085.74x = 3,859,271.58
  5. Step 5: Solve for x
    x = 3,859,271.58/2,085.74
  6. Step 6: Final answer
    x = 1,850.31

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1.5x scale

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.