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Finding the Fourth Proportional to 522.80, 784.71 and 398.24

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Solution

The fourth proportional to 522.80, 784.71 and 398.24 is: 597.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.80 : 784.71 = 398.24 : x
  2. Step 2: Convert to fraction form
    522.80/784.71 = 398.24/x
  3. Step 3: Cross multiply
    522.80x = 784.71 × 398.24
  4. Step 4: Simplify right side
    522.80x = 312,505.26
  5. Step 5: Solve for x
    x = 312,505.26/522.80
  6. Step 6: Final answer
    x = 597.75

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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.