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Finding the Fourth Proportional to 369, 510.12 and 325.20

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Solution

The fourth proportional to 369, 510.12 and 325.20 is: 449.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    369 : 510.12 = 325.20 : x
  2. Step 2: Convert to fraction form
    369/510.12 = 325.20/x
  3. Step 3: Cross multiply
    369x = 510.12 × 325.20
  4. Step 4: Simplify right side
    369x = 165,891.02
  5. Step 5: Solve for x
    x = 165,891.02/369
  6. Step 6: Final answer
    x = 449.57

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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.