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Finding the Fourth Proportional to 416.02, 624.72 and 399.46

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Solution

The fourth proportional to 416.02, 624.72 and 399.46 is: 599.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.02 : 624.72 = 399.46 : x
  2. Step 2: Convert to fraction form
    416.02/624.72 = 399.46/x
  3. Step 3: Cross multiply
    416.02x = 624.72 × 399.46
  4. Step 4: Simplify right side
    416.02x = 249,553.21
  5. Step 5: Solve for x
    x = 249,553.21/416.02
  6. Step 6: Final answer
    x = 599.86

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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.