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Finding the Fourth Proportional to 1,367.24, 2,051.21 and 782.91

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Solution

The fourth proportional to 1,367.24, 2,051.21 and 782.91 is: 1,174.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367.24 : 2,051.21 = 782.91 : x
  2. Step 2: Convert to fraction form
    1,367.24/2,051.21 = 782.91/x
  3. Step 3: Cross multiply
    1,367.24x = 2,051.21 × 782.91
  4. Step 4: Simplify right side
    1,367.24x = 1,605,908.91
  5. Step 5: Solve for x
    x = 1,605,908.91/1,367.24
  6. Step 6: Final answer
    x = 1,174.57

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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.