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Finding the Fourth Proportional to 555.94, 767.45 and 396.55

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Solution

The fourth proportional to 555.94, 767.45 and 396.55 is: 547.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.94 : 767.45 = 396.55 : x
  2. Step 2: Convert to fraction form
    555.94/767.45 = 396.55/x
  3. Step 3: Cross multiply
    555.94x = 767.45 × 396.55
  4. Step 4: Simplify right side
    555.94x = 304,328.82
  5. Step 5: Solve for x
    x = 304,328.82/555.94
  6. Step 6: Final answer
    x = 547.41

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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.