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Finding the Fourth Proportional to 510.95, 765.92 and 388.95

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Solution

The fourth proportional to 510.95, 765.92 and 388.95 is: 583.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.95 : 765.92 = 388.95 : x
  2. Step 2: Convert to fraction form
    510.95/765.92 = 388.95/x
  3. Step 3: Cross multiply
    510.95x = 765.92 × 388.95
  4. Step 4: Simplify right side
    510.95x = 297,902.64
  5. Step 5: Solve for x
    x = 297,902.64/510.95
  6. Step 6: Final answer
    x = 583.04

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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.