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Finding the Fourth Proportional to 1,951.19, 2,924.81 and 780.64

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Solution

The fourth proportional to 1,951.19, 2,924.81 and 780.64 is: 1,170.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951.19 : 2,924.81 = 780.64 : x
  2. Step 2: Convert to fraction form
    1,951.19/2,924.81 = 780.64/x
  3. Step 3: Cross multiply
    1,951.19x = 2,924.81 × 780.64
  4. Step 4: Simplify right side
    1,951.19x = 2,283,215.39
  5. Step 5: Solve for x
    x = 2,283,215.39/1,951.19
  6. Step 6: Final answer
    x = 1,170.17

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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.