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Finding the Fourth Proportional to 988.24, 1,482.28 and 247.85

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Solution

The fourth proportional to 988.24, 1,482.28 and 247.85 is: 371.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.24 : 1,482.28 = 247.85 : x
  2. Step 2: Convert to fraction form
    988.24/1,482.28 = 247.85/x
  3. Step 3: Cross multiply
    988.24x = 1,482.28 × 247.85
  4. Step 4: Simplify right side
    988.24x = 367,383.10
  5. Step 5: Solve for x
    x = 367,383.10/988.24
  6. Step 6: Final answer
    x = 371.75

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Double scale
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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.