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Finding the Fourth Proportional to 3,318, 4,977 and 1,009.50

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Solution

The fourth proportional to 3,318, 4,977 and 1,009.50 is: 1,514.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318 : 4,977 = 1,009.50 : x
  2. Step 2: Convert to fraction form
    3,318/4,977 = 1,009.50/x
  3. Step 3: Cross multiply
    3,318x = 4,977 × 1,009.50
  4. Step 4: Simplify right side
    3,318x = 5,024,281.50
  5. Step 5: Solve for x
    x = 5,024,281.50/3,318
  6. Step 6: Final answer
    x = 1,514.25

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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.