Home / 1,589.95-2,196.18-1,221.46

Finding the Fourth Proportional to 1,589.95, 2,196.18 and 1,221.46

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Solution

The fourth proportional to 1,589.95, 2,196.18 and 1,221.46 is: 1,687.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,589.95 : 2,196.18 = 1,221.46 : x
  2. Step 2: Convert to fraction form
    1,589.95/2,196.18 = 1,221.46/x
  3. Step 3: Cross multiply
    1,589.95x = 2,196.18 × 1,221.46
  4. Step 4: Simplify right side
    1,589.95x = 2,682,547.73
  5. Step 5: Solve for x
    x = 2,682,547.73/1,589.95
  6. Step 6: Final answer
    x = 1,687.19

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Double scale
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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.