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Finding the Fourth Proportional to 477.99, 717.34 and 355.88

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Solution

The fourth proportional to 477.99, 717.34 and 355.88 is: 534.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.99 : 717.34 = 355.88 : x
  2. Step 2: Convert to fraction form
    477.99/717.34 = 355.88/x
  3. Step 3: Cross multiply
    477.99x = 717.34 × 355.88
  4. Step 4: Simplify right side
    477.99x = 255,287.86
  5. Step 5: Solve for x
    x = 255,287.86/477.99
  6. Step 6: Final answer
    x = 534.09

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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.