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Finding the Fourth Proportional to 624.56, 862.04 and 388.55

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Solution

The fourth proportional to 624.56, 862.04 and 388.55 is: 536.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.56 : 862.04 = 388.55 : x
  2. Step 2: Convert to fraction form
    624.56/862.04 = 388.55/x
  3. Step 3: Cross multiply
    624.56x = 862.04 × 388.55
  4. Step 4: Simplify right side
    624.56x = 334,943.92
  5. Step 5: Solve for x
    x = 334,943.92/624.56
  6. Step 6: Final answer
    x = 536.29

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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.