Home / 2,011.30-2,775.45-1,225.20

Finding the Fourth Proportional to 2,011.30, 2,775.45 and 1,225.20

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Solution

The fourth proportional to 2,011.30, 2,775.45 and 1,225.20 is: 1,690.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.30 : 2,775.45 = 1,225.20 : x
  2. Step 2: Convert to fraction form
    2,011.30/2,775.45 = 1,225.20/x
  3. Step 3: Cross multiply
    2,011.30x = 2,775.45 × 1,225.20
  4. Step 4: Simplify right side
    2,011.30x = 3,400,481.34
  5. Step 5: Solve for x
    x = 3,400,481.34/2,011.30
  6. Step 6: Final answer
    x = 1,690.69

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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.