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Finding the Fourth Proportional to 510.45, 765.64 and 145.22

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Solution

The fourth proportional to 510.45, 765.64 and 145.22 is: 217.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.45 : 765.64 = 145.22 : x
  2. Step 2: Convert to fraction form
    510.45/765.64 = 145.22/x
  3. Step 3: Cross multiply
    510.45x = 765.64 × 145.22
  4. Step 4: Simplify right side
    510.45x = 111,186.24
  5. Step 5: Solve for x
    x = 111,186.24/510.45
  6. Step 6: Final answer
    x = 217.82

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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.