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Finding the Fourth Proportional to 794.14, 1,190.18 and 640.14

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Solution

The fourth proportional to 794.14, 1,190.18 and 640.14 is: 959.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.14 : 1,190.18 = 640.14 : x
  2. Step 2: Convert to fraction form
    794.14/1,190.18 = 640.14/x
  3. Step 3: Cross multiply
    794.14x = 1,190.18 × 640.14
  4. Step 4: Simplify right side
    794.14x = 761,878.96
  5. Step 5: Solve for x
    x = 761,878.96/794.14
  6. Step 6: Final answer
    x = 959.38

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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.