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Finding the Fourth Proportional to 739.94, 1,109.90 and 307.11

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Solution

The fourth proportional to 739.94, 1,109.90 and 307.11 is: 460.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.94 : 1,109.90 = 307.11 : x
  2. Step 2: Convert to fraction form
    739.94/1,109.90 = 307.11/x
  3. Step 3: Cross multiply
    739.94x = 1,109.90 × 307.11
  4. Step 4: Simplify right side
    739.94x = 340,861.39
  5. Step 5: Solve for x
    x = 340,861.39/739.94
  6. Step 6: Final answer
    x = 460.66

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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.