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Finding the Fourth Proportional to 514.61, 772.10 and 309.32

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Solution

The fourth proportional to 514.61, 772.10 and 309.32 is: 464.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.61 : 772.10 = 309.32 : x
  2. Step 2: Convert to fraction form
    514.61/772.10 = 309.32/x
  3. Step 3: Cross multiply
    514.61x = 772.10 × 309.32
  4. Step 4: Simplify right side
    514.61x = 238,825.97
  5. Step 5: Solve for x
    x = 238,825.97/514.61
  6. Step 6: Final answer
    x = 464.09

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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.