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Finding the Fourth Proportional to 624.72, 863.28 and 521.04

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Solution

The fourth proportional to 624.72, 863.28 and 521.04 is: 720.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.72 : 863.28 = 521.04 : x
  2. Step 2: Convert to fraction form
    624.72/863.28 = 521.04/x
  3. Step 3: Cross multiply
    624.72x = 863.28 × 521.04
  4. Step 4: Simplify right side
    624.72x = 449,803.41
  5. Step 5: Solve for x
    x = 449,803.41/624.72
  6. Step 6: Final answer
    x = 720.01

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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.