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Finding the Fourth Proportional to 555.99, 767.12 and 408.36

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Solution

The fourth proportional to 555.99, 767.12 and 408.36 is: 563.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.99 : 767.12 = 408.36 : x
  2. Step 2: Convert to fraction form
    555.99/767.12 = 408.36/x
  3. Step 3: Cross multiply
    555.99x = 767.12 × 408.36
  4. Step 4: Simplify right side
    555.99x = 313,261.12
  5. Step 5: Solve for x
    x = 313,261.12/555.99
  6. Step 6: Final answer
    x = 563.43

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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.