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Finding the Fourth Proportional to 901.81, 1,244.51 and 487.81

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Solution

The fourth proportional to 901.81, 1,244.51 and 487.81 is: 673.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.81 : 1,244.51 = 487.81 : x
  2. Step 2: Convert to fraction form
    901.81/1,244.51 = 487.81/x
  3. Step 3: Cross multiply
    901.81x = 1,244.51 × 487.81
  4. Step 4: Simplify right side
    901.81x = 607,081.98
  5. Step 5: Solve for x
    x = 607,081.98/901.81
  6. Step 6: Final answer
    x = 673.18

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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.