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Finding the Fourth Proportional to 510.55, 765.44 and 163.68

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Solution

The fourth proportional to 510.55, 765.44 and 163.68 is: 245.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.55 : 765.44 = 163.68 : x
  2. Step 2: Convert to fraction form
    510.55/765.44 = 163.68/x
  3. Step 3: Cross multiply
    510.55x = 765.44 × 163.68
  4. Step 4: Simplify right side
    510.55x = 125,287.22
  5. Step 5: Solve for x
    x = 125,287.22/510.55
  6. Step 6: Final answer
    x = 245.40

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1.5x scale

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.