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Finding the Fourth Proportional to 901.75, 1,243.84 and 622.01

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Solution

The fourth proportional to 901.75, 1,243.84 and 622.01 is: 857.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.75 : 1,243.84 = 622.01 : x
  2. Step 2: Convert to fraction form
    901.75/1,243.84 = 622.01/x
  3. Step 3: Cross multiply
    901.75x = 1,243.84 × 622.01
  4. Step 4: Simplify right side
    901.75x = 773,680.92
  5. Step 5: Solve for x
    x = 773,680.92/901.75
  6. Step 6: Final answer
    x = 857.98

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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.