Home / 1,257.48-1,885.20-1,086.18

Finding the Fourth Proportional to 1,257.48, 1,885.20 and 1,086.18

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Solution

The fourth proportional to 1,257.48, 1,885.20 and 1,086.18 is: 1,628.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.48 : 1,885.20 = 1,086.18 : x
  2. Step 2: Convert to fraction form
    1,257.48/1,885.20 = 1,086.18/x
  3. Step 3: Cross multiply
    1,257.48x = 1,885.20 × 1,086.18
  4. Step 4: Simplify right side
    1,257.48x = 2,047,666.54
  5. Step 5: Solve for x
    x = 2,047,666.54/1,257.48
  6. Step 6: Final answer
    x = 1,628.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.