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Finding the Fourth Proportional to 988.85, 1,482.39 and 372.38

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Solution

The fourth proportional to 988.85, 1,482.39 and 372.38 is: 558.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.85 : 1,482.39 = 372.38 : x
  2. Step 2: Convert to fraction form
    988.85/1,482.39 = 372.38/x
  3. Step 3: Cross multiply
    988.85x = 1,482.39 × 372.38
  4. Step 4: Simplify right side
    988.85x = 552,004.98
  5. Step 5: Solve for x
    x = 552,004.98/988.85
  6. Step 6: Final answer
    x = 558.23

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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.