Home / 1,885.31-2,600.07-1,221.51

Finding the Fourth Proportional to 1,885.31, 2,600.07 and 1,221.51

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Solution

The fourth proportional to 1,885.31, 2,600.07 and 1,221.51 is: 1,684.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.31 : 2,600.07 = 1,221.51 : x
  2. Step 2: Convert to fraction form
    1,885.31/2,600.07 = 1,221.51/x
  3. Step 3: Cross multiply
    1,885.31x = 2,600.07 × 1,221.51
  4. Step 4: Simplify right side
    1,885.31x = 3,176,011.51
  5. Step 5: Solve for x
    x = 3,176,011.51/1,885.31
  6. Step 6: Final answer
    x = 1,684.61

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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.