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Finding the Fourth Proportional to 510.62, 765.16 and 315.09

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Solution

The fourth proportional to 510.62, 765.16 and 315.09 is: 472.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.62 : 765.16 = 315.09 : x
  2. Step 2: Convert to fraction form
    510.62/765.16 = 315.09/x
  3. Step 3: Cross multiply
    510.62x = 765.16 × 315.09
  4. Step 4: Simplify right side
    510.62x = 241,095.25
  5. Step 5: Solve for x
    x = 241,095.25/510.62
  6. Step 6: Final answer
    x = 472.16

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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.