Home / 1,901.28-2,621.88-1,236.72

Finding the Fourth Proportional to 1,901.28, 2,621.88 and 1,236.72

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Solution

The fourth proportional to 1,901.28, 2,621.88 and 1,236.72 is: 1,705.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,901.28 : 2,621.88 = 1,236.72 : x
  2. Step 2: Convert to fraction form
    1,901.28/2,621.88 = 1,236.72/x
  3. Step 3: Cross multiply
    1,901.28x = 2,621.88 × 1,236.72
  4. Step 4: Simplify right side
    1,901.28x = 3,242,531.43
  5. Step 5: Solve for x
    x = 3,242,531.43/1,901.28
  6. Step 6: Final answer
    x = 1,705.45

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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.