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Finding the Fourth Proportional to 1,301.19, 1,948.35 and 779.95

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Solution

The fourth proportional to 1,301.19, 1,948.35 and 779.95 is: 1,167.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,301.19 : 1,948.35 = 779.95 : x
  2. Step 2: Convert to fraction form
    1,301.19/1,948.35 = 779.95/x
  3. Step 3: Cross multiply
    1,301.19x = 1,948.35 × 779.95
  4. Step 4: Simplify right side
    1,301.19x = 1,519,615.58
  5. Step 5: Solve for x
    x = 1,519,615.58/1,301.19
  6. Step 6: Final answer
    x = 1,167.87

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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.