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Finding the Fourth Proportional to 1,077.17, 1,615.82 and 427.95

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Solution

The fourth proportional to 1,077.17, 1,615.82 and 427.95 is: 641.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077.17 : 1,615.82 = 427.95 : x
  2. Step 2: Convert to fraction form
    1,077.17/1,615.82 = 427.95/x
  3. Step 3: Cross multiply
    1,077.17x = 1,615.82 × 427.95
  4. Step 4: Simplify right side
    1,077.17x = 691,488.03
  5. Step 5: Solve for x
    x = 691,488.03/1,077.17
  6. Step 6: Final answer
    x = 641.95

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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.