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Finding the Fourth Proportional to 988.12, 1,482.04 and 461.22

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Solution

The fourth proportional to 988.12, 1,482.04 and 461.22 is: 691.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.12 : 1,482.04 = 461.22 : x
  2. Step 2: Convert to fraction form
    988.12/1,482.04 = 461.22/x
  3. Step 3: Cross multiply
    988.12x = 1,482.04 × 461.22
  4. Step 4: Simplify right side
    988.12x = 683,546.49
  5. Step 5: Solve for x
    x = 683,546.49/988.12
  6. Step 6: Final answer
    x = 691.76

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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.