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Finding the Fourth Proportional to 781.83, 1,173.28 and 295.29

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Solution

The fourth proportional to 781.83, 1,173.28 and 295.29 is: 443.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    781.83 : 1,173.28 = 295.29 : x
  2. Step 2: Convert to fraction form
    781.83/1,173.28 = 295.29/x
  3. Step 3: Cross multiply
    781.83x = 1,173.28 × 295.29
  4. Step 4: Simplify right side
    781.83x = 346,457.85
  5. Step 5: Solve for x
    x = 346,457.85/781.83
  6. Step 6: Final answer
    x = 443.14

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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.