Home / 2,219.86-3,063.45-1,275.70

Finding the Fourth Proportional to 2,219.86, 3,063.45 and 1,275.70

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Solution

The fourth proportional to 2,219.86, 3,063.45 and 1,275.70 is: 1,760.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.86 : 3,063.45 = 1,275.70 : x
  2. Step 2: Convert to fraction form
    2,219.86/3,063.45 = 1,275.70/x
  3. Step 3: Cross multiply
    2,219.86x = 3,063.45 × 1,275.70
  4. Step 4: Simplify right side
    2,219.86x = 3,908,043.17
  5. Step 5: Solve for x
    x = 3,908,043.17/2,219.86
  6. Step 6: Final answer
    x = 1,760.49

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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.