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Finding the Fourth Proportional to 782.05, 1,172.62 and 295.14

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Solution

The fourth proportional to 782.05, 1,172.62 and 295.14 is: 442.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.05 : 1,172.62 = 295.14 : x
  2. Step 2: Convert to fraction form
    782.05/1,172.62 = 295.14/x
  3. Step 3: Cross multiply
    782.05x = 1,172.62 × 295.14
  4. Step 4: Simplify right side
    782.05x = 346,085.59
  5. Step 5: Solve for x
    x = 346,085.59/782.05
  6. Step 6: Final answer
    x = 442.54

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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.