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Finding the Fourth Proportional to 1,036.69, 1,555.18 and 378.60

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Solution

The fourth proportional to 1,036.69, 1,555.18 and 378.60 is: 567.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.69 : 1,555.18 = 378.60 : x
  2. Step 2: Convert to fraction form
    1,036.69/1,555.18 = 378.60/x
  3. Step 3: Cross multiply
    1,036.69x = 1,555.18 × 378.60
  4. Step 4: Simplify right side
    1,036.69x = 588,791.15
  5. Step 5: Solve for x
    x = 588,791.15/1,036.69
  6. Step 6: Final answer
    x = 567.95

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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.