Home / 1,581.95-2,181.78-1,188.29

Finding the Fourth Proportional to 1,581.95, 2,181.78 and 1,188.29

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Solution

The fourth proportional to 1,581.95, 2,181.78 and 1,188.29 is: 1,638.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.95 : 2,181.78 = 1,188.29 : x
  2. Step 2: Convert to fraction form
    1,581.95/2,181.78 = 1,188.29/x
  3. Step 3: Cross multiply
    1,581.95x = 2,181.78 × 1,188.29
  4. Step 4: Simplify right side
    1,581.95x = 2,592,587.36
  5. Step 5: Solve for x
    x = 2,592,587.36/1,581.95
  6. Step 6: Final answer
    x = 1,638.86

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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.