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Finding the Fourth Proportional to 597.72, 824.87 and 387.99

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Solution

The fourth proportional to 597.72, 824.87 and 387.99 is: 535.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    597.72 : 824.87 = 387.99 : x
  2. Step 2: Convert to fraction form
    597.72/824.87 = 387.99/x
  3. Step 3: Cross multiply
    597.72x = 824.87 × 387.99
  4. Step 4: Simplify right side
    597.72x = 320,041.31
  5. Step 5: Solve for x
    x = 320,041.31/597.72
  6. Step 6: Final answer
    x = 535.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.