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Finding the Fourth Proportional to 523.79, 780.86 and 499.18

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Solution

The fourth proportional to 523.79, 780.86 and 499.18 is: 744.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.79 : 780.86 = 499.18 : x
  2. Step 2: Convert to fraction form
    523.79/780.86 = 499.18/x
  3. Step 3: Cross multiply
    523.79x = 780.86 × 499.18
  4. Step 4: Simplify right side
    523.79x = 389,789.69
  5. Step 5: Solve for x
    x = 389,789.69/523.79
  6. Step 6: Final answer
    x = 744.18

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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.