Home / 2,128.18-3,193.08-830.56

Finding the Fourth Proportional to 2,128.18, 3,193.08 and 830.56

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Solution

The fourth proportional to 2,128.18, 3,193.08 and 830.56 is: 1,246.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.18 : 3,193.08 = 830.56 : x
  2. Step 2: Convert to fraction form
    2,128.18/3,193.08 = 830.56/x
  3. Step 3: Cross multiply
    2,128.18x = 3,193.08 × 830.56
  4. Step 4: Simplify right side
    2,128.18x = 2,652,044.52
  5. Step 5: Solve for x
    x = 2,652,044.52/2,128.18
  6. Step 6: Final answer
    x = 1,246.16

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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.