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Finding the Fourth Proportional to 988.84, 1,482.88 and 330.56

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Solution

The fourth proportional to 988.84, 1,482.88 and 330.56 is: 495.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.84 : 1,482.88 = 330.56 : x
  2. Step 2: Convert to fraction form
    988.84/1,482.88 = 330.56/x
  3. Step 3: Cross multiply
    988.84x = 1,482.88 × 330.56
  4. Step 4: Simplify right side
    988.84x = 490,180.81
  5. Step 5: Solve for x
    x = 490,180.81/988.84
  6. Step 6: Final answer
    x = 495.71

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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.