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Finding the Fourth Proportional to 522.99, 721.76 and 348.21

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Solution

The fourth proportional to 522.99, 721.76 and 348.21 is: 480.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.99 : 721.76 = 348.21 : x
  2. Step 2: Convert to fraction form
    522.99/721.76 = 348.21/x
  3. Step 3: Cross multiply
    522.99x = 721.76 × 348.21
  4. Step 4: Simplify right side
    522.99x = 251,322.31
  5. Step 5: Solve for x
    x = 251,322.31/522.99
  6. Step 6: Final answer
    x = 480.55

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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.