Home / 2,128.02-3,190.14-1,031.28

Finding the Fourth Proportional to 2,128.02, 3,190.14 and 1,031.28

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Solution

The fourth proportional to 2,128.02, 3,190.14 and 1,031.28 is: 1,546.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.02 : 3,190.14 = 1,031.28 : x
  2. Step 2: Convert to fraction form
    2,128.02/3,190.14 = 1,031.28/x
  3. Step 3: Cross multiply
    2,128.02x = 3,190.14 × 1,031.28
  4. Step 4: Simplify right side
    2,128.02x = 3,289,927.58
  5. Step 5: Solve for x
    x = 3,289,927.58/2,128.02
  6. Step 6: Final answer
    x = 1,546.00

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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.