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Finding the Fourth Proportional to 1,153.39, 1,730.31 and 422.95

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Solution

The fourth proportional to 1,153.39, 1,730.31 and 422.95 is: 634.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.39 : 1,730.31 = 422.95 : x
  2. Step 2: Convert to fraction form
    1,153.39/1,730.31 = 422.95/x
  3. Step 3: Cross multiply
    1,153.39x = 1,730.31 × 422.95
  4. Step 4: Simplify right side
    1,153.39x = 731,825.96
  5. Step 5: Solve for x
    x = 731,825.96/1,153.39
  6. Step 6: Final answer
    x = 634.50

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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.