Home / 2,020.90-3,031.38-634.20

Finding the Fourth Proportional to 2,020.90, 3,031.38 and 634.20

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Solution

The fourth proportional to 2,020.90, 3,031.38 and 634.20 is: 951.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,020.90 : 3,031.38 = 634.20 : x
  2. Step 2: Convert to fraction form
    2,020.90/3,031.38 = 634.20/x
  3. Step 3: Cross multiply
    2,020.90x = 3,031.38 × 634.20
  4. Step 4: Simplify right side
    2,020.90x = 1,922,501.20
  5. Step 5: Solve for x
    x = 1,922,501.20/2,020.90
  6. Step 6: Final answer
    x = 951.31

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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.