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Finding the Fourth Proportional to 510.80, 764.67 and 455.45

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Solution

The fourth proportional to 510.80, 764.67 and 455.45 is: 681.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.80 : 764.67 = 455.45 : x
  2. Step 2: Convert to fraction form
    510.80/764.67 = 455.45/x
  3. Step 3: Cross multiply
    510.80x = 764.67 × 455.45
  4. Step 4: Simplify right side
    510.80x = 348,268.95
  5. Step 5: Solve for x
    x = 348,268.95/510.80
  6. Step 6: Final answer
    x = 681.81

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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.