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Finding the Fourth Proportional to 783.38, 1,174.44 and 296.30

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Solution

The fourth proportional to 783.38, 1,174.44 and 296.30 is: 444.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.38 : 1,174.44 = 296.30 : x
  2. Step 2: Convert to fraction form
    783.38/1,174.44 = 296.30/x
  3. Step 3: Cross multiply
    783.38x = 1,174.44 × 296.30
  4. Step 4: Simplify right side
    783.38x = 347,986.57
  5. Step 5: Solve for x
    x = 347,986.57/783.38
  6. Step 6: Final answer
    x = 444.21

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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.