Home / 1,621.28-2,236.98-913.17

Finding the Fourth Proportional to 1,621.28, 2,236.98 and 913.17

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Solution

The fourth proportional to 1,621.28, 2,236.98 and 913.17 is: 1,259.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.28 : 2,236.98 = 913.17 : x
  2. Step 2: Convert to fraction form
    1,621.28/2,236.98 = 913.17/x
  3. Step 3: Cross multiply
    1,621.28x = 2,236.98 × 913.17
  4. Step 4: Simplify right side
    1,621.28x = 2,042,754.84
  5. Step 5: Solve for x
    x = 2,042,754.84/1,621.28
  6. Step 6: Final answer
    x = 1,259.96

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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.