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Finding the Fourth Proportional to 910.73, 1,366.56 and 423.70

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Solution

The fourth proportional to 910.73, 1,366.56 and 423.70 is: 635.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.73 : 1,366.56 = 423.70 : x
  2. Step 2: Convert to fraction form
    910.73/1,366.56 = 423.70/x
  3. Step 3: Cross multiply
    910.73x = 1,366.56 × 423.70
  4. Step 4: Simplify right side
    910.73x = 579,008.06
  5. Step 5: Solve for x
    x = 579,008.06/910.73
  6. Step 6: Final answer
    x = 635.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.