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Finding the Fourth Proportional to 782.82, 1,080.25 and 433.50

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Solution

The fourth proportional to 782.82, 1,080.25 and 433.50 is: 598.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.82 : 1,080.25 = 433.50 : x
  2. Step 2: Convert to fraction form
    782.82/1,080.25 = 433.50/x
  3. Step 3: Cross multiply
    782.82x = 1,080.25 × 433.50
  4. Step 4: Simplify right side
    782.82x = 468,288.38
  5. Step 5: Solve for x
    x = 468,288.38/782.82
  6. Step 6: Final answer
    x = 598.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.