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Finding the Fourth Proportional to 2,988.40, 4,482.78 and 908.48

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Solution

The fourth proportional to 2,988.40, 4,482.78 and 908.48 is: 1,362.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.40 : 4,482.78 = 908.48 : x
  2. Step 2: Convert to fraction form
    2,988.40/4,482.78 = 908.48/x
  3. Step 3: Cross multiply
    2,988.40x = 4,482.78 × 908.48
  4. Step 4: Simplify right side
    2,988.40x = 4,072,515.97
  5. Step 5: Solve for x
    x = 4,072,515.97/2,988.40
  6. Step 6: Final answer
    x = 1,362.77

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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.