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Finding the Fourth Proportional to 1,180.53, 1,770.21 and 486.95

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Solution

The fourth proportional to 1,180.53, 1,770.21 and 486.95 is: 730.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.53 : 1,770.21 = 486.95 : x
  2. Step 2: Convert to fraction form
    1,180.53/1,770.21 = 486.95/x
  3. Step 3: Cross multiply
    1,180.53x = 1,770.21 × 486.95
  4. Step 4: Simplify right side
    1,180.53x = 861,994.91
  5. Step 5: Solve for x
    x = 861,994.91/1,180.53
  6. Step 6: Final answer
    x = 730.18

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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.