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Finding the Fourth Proportional to 1,764.17, 2,645.29 and 839.94

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Solution

The fourth proportional to 1,764.17, 2,645.29 and 839.94 is: 1,259.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,764.17 : 2,645.29 = 839.94 : x
  2. Step 2: Convert to fraction form
    1,764.17/2,645.29 = 839.94/x
  3. Step 3: Cross multiply
    1,764.17x = 2,645.29 × 839.94
  4. Step 4: Simplify right side
    1,764.17x = 2,221,884.88
  5. Step 5: Solve for x
    x = 2,221,884.88/1,764.17
  6. Step 6: Final answer
    x = 1,259.45

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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.