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Finding the Fourth Proportional to 744.02, 1,116.14 and 311.20

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Solution

The fourth proportional to 744.02, 1,116.14 and 311.20 is: 466.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.02 : 1,116.14 = 311.20 : x
  2. Step 2: Convert to fraction form
    744.02/1,116.14 = 311.20/x
  3. Step 3: Cross multiply
    744.02x = 1,116.14 × 311.20
  4. Step 4: Simplify right side
    744.02x = 347,342.77
  5. Step 5: Solve for x
    x = 347,342.77/744.02
  6. Step 6: Final answer
    x = 466.85

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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.