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Finding the Fourth Proportional to 901.97, 1,244.72 and 487.97

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Solution

The fourth proportional to 901.97, 1,244.72 and 487.97 is: 673.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.97 : 1,244.72 = 487.97 : x
  2. Step 2: Convert to fraction form
    901.97/1,244.72 = 487.97/x
  3. Step 3: Cross multiply
    901.97x = 1,244.72 × 487.97
  4. Step 4: Simplify right side
    901.97x = 607,382.94
  5. Step 5: Solve for x
    x = 607,382.94/901.97
  6. Step 6: Final answer
    x = 673.40

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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.