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Finding the Fourth Proportional to 1,909.90, 2,862.96 and 922.47

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Solution

The fourth proportional to 1,909.90, 2,862.96 and 922.47 is: 1,382.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.90 : 2,862.96 = 922.47 : x
  2. Step 2: Convert to fraction form
    1,909.90/2,862.96 = 922.47/x
  3. Step 3: Cross multiply
    1,909.90x = 2,862.96 × 922.47
  4. Step 4: Simplify right side
    1,909.90x = 2,640,994.71
  5. Step 5: Solve for x
    x = 2,640,994.71/1,909.90
  6. Step 6: Final answer
    x = 1,382.79

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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.