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Finding the Fourth Proportional to 1,920.68, 2,880.48 and 996.20

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Solution

The fourth proportional to 1,920.68, 2,880.48 and 996.20 is: 1,494.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.68 : 2,880.48 = 996.20 : x
  2. Step 2: Convert to fraction form
    1,920.68/2,880.48 = 996.20/x
  3. Step 3: Cross multiply
    1,920.68x = 2,880.48 × 996.20
  4. Step 4: Simplify right side
    1,920.68x = 2,869,534.18
  5. Step 5: Solve for x
    x = 2,869,534.18/1,920.68
  6. Step 6: Final answer
    x = 1,494.02

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1.5x scale

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.