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Finding the Fourth Proportional to 416.40, 624.56 and 314.21

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Solution

The fourth proportional to 416.40, 624.56 and 314.21 is: 471.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.40 : 624.56 = 314.21 : x
  2. Step 2: Convert to fraction form
    416.40/624.56 = 314.21/x
  3. Step 3: Cross multiply
    416.40x = 624.56 × 314.21
  4. Step 4: Simplify right side
    416.40x = 196,243.00
  5. Step 5: Solve for x
    x = 196,243.00/416.40
  6. Step 6: Final answer
    x = 471.28

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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.