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Finding the Fourth Proportional to 2,911.70, 4,367.58 and 910.40

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Solution

The fourth proportional to 2,911.70, 4,367.58 and 910.40 is: 1,365.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.70 : 4,367.58 = 910.40 : x
  2. Step 2: Convert to fraction form
    2,911.70/4,367.58 = 910.40/x
  3. Step 3: Cross multiply
    2,911.70x = 4,367.58 × 910.40
  4. Step 4: Simplify right side
    2,911.70x = 3,976,244.83
  5. Step 5: Solve for x
    x = 3,976,244.83/2,911.70
  6. Step 6: Final answer
    x = 1,365.61

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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.