Home / 2,290.20-3,159.99-1,345.74

Finding the Fourth Proportional to 2,290.20, 3,159.99 and 1,345.74

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Solution

The fourth proportional to 2,290.20, 3,159.99 and 1,345.74 is: 1,856.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,290.20 : 3,159.99 = 1,345.74 : x
  2. Step 2: Convert to fraction form
    2,290.20/3,159.99 = 1,345.74/x
  3. Step 3: Cross multiply
    2,290.20x = 3,159.99 × 1,345.74
  4. Step 4: Simplify right side
    2,290.20x = 4,252,524.94
  5. Step 5: Solve for x
    x = 4,252,524.94/2,290.20
  6. Step 6: Final answer
    x = 1,856.84

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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.