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Finding the Fourth Proportional to 1,955.69, 2,934.95 and 769.91

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Solution

The fourth proportional to 1,955.69, 2,934.95 and 769.91 is: 1,155.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.69 : 2,934.95 = 769.91 : x
  2. Step 2: Convert to fraction form
    1,955.69/2,934.95 = 769.91/x
  3. Step 3: Cross multiply
    1,955.69x = 2,934.95 × 769.91
  4. Step 4: Simplify right side
    1,955.69x = 2,259,628.83
  5. Step 5: Solve for x
    x = 2,259,628.83/1,955.69
  6. Step 6: Final answer
    x = 1,155.41

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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.