Home / 1,630.29-2,249.78-931.80

Finding the Fourth Proportional to 1,630.29, 2,249.78 and 931.80

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Solution

The fourth proportional to 1,630.29, 2,249.78 and 931.80 is: 1,285.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,630.29 : 2,249.78 = 931.80 : x
  2. Step 2: Convert to fraction form
    1,630.29/2,249.78 = 931.80/x
  3. Step 3: Cross multiply
    1,630.29x = 2,249.78 × 931.80
  4. Step 4: Simplify right side
    1,630.29x = 2,096,345.00
  5. Step 5: Solve for x
    x = 2,096,345.00/1,630.29
  6. Step 6: Final answer
    x = 1,285.87

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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.