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Finding the Fourth Proportional to 1,365.10, 2,045.17 and 779.38

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Solution

The fourth proportional to 1,365.10, 2,045.17 and 779.38 is: 1,167.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,365.10 : 2,045.17 = 779.38 : x
  2. Step 2: Convert to fraction form
    1,365.10/2,045.17 = 779.38/x
  3. Step 3: Cross multiply
    1,365.10x = 2,045.17 × 779.38
  4. Step 4: Simplify right side
    1,365.10x = 1,593,964.59
  5. Step 5: Solve for x
    x = 1,593,964.59/1,365.10
  6. Step 6: Final answer
    x = 1,167.65

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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.