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Finding the Fourth Proportional to 782.10, 1,173.02 and 452.84

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Solution

The fourth proportional to 782.10, 1,173.02 and 452.84 is: 679.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.10 : 1,173.02 = 452.84 : x
  2. Step 2: Convert to fraction form
    782.10/1,173.02 = 452.84/x
  3. Step 3: Cross multiply
    782.10x = 1,173.02 × 452.84
  4. Step 4: Simplify right side
    782.10x = 531,182.25
  5. Step 5: Solve for x
    x = 531,182.25/782.10
  6. Step 6: Final answer
    x = 679.17

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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.