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Finding the Fourth Proportional to 523.84, 782.80 and 511.68

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Solution

The fourth proportional to 523.84, 782.80 and 511.68 is: 764.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.84 : 782.80 = 511.68 : x
  2. Step 2: Convert to fraction form
    523.84/782.80 = 511.68/x
  3. Step 3: Cross multiply
    523.84x = 782.80 × 511.68
  4. Step 4: Simplify right side
    523.84x = 400,543.10
  5. Step 5: Solve for x
    x = 400,543.10/523.84
  6. Step 6: Final answer
    x = 764.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.