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Finding the Fourth Proportional to 901.66, 1,244.28 and 487.66

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Solution

The fourth proportional to 901.66, 1,244.28 and 487.66 is: 672.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.66 : 1,244.28 = 487.66 : x
  2. Step 2: Convert to fraction form
    901.66/1,244.28 = 487.66/x
  3. Step 3: Cross multiply
    901.66x = 1,244.28 × 487.66
  4. Step 4: Simplify right side
    901.66x = 606,785.58
  5. Step 5: Solve for x
    x = 606,785.58/901.66
  6. Step 6: Final answer
    x = 672.96

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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.