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Finding the Fourth Proportional to 510.11, 765.30 and 312.68

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Solution

The fourth proportional to 510.11, 765.30 and 312.68 is: 469.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.11 : 765.30 = 312.68 : x
  2. Step 2: Convert to fraction form
    510.11/765.30 = 312.68/x
  3. Step 3: Cross multiply
    510.11x = 765.30 × 312.68
  4. Step 4: Simplify right side
    510.11x = 239,294.00
  5. Step 5: Solve for x
    x = 239,294.00/510.11
  6. Step 6: Final answer
    x = 469.10

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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.