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Finding the Fourth Proportional to 499.19, 748.40 and 412.25

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Solution

The fourth proportional to 499.19, 748.40 and 412.25 is: 618.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.19 : 748.40 = 412.25 : x
  2. Step 2: Convert to fraction form
    499.19/748.40 = 412.25/x
  3. Step 3: Cross multiply
    499.19x = 748.40 × 412.25
  4. Step 4: Simplify right side
    499.19x = 308,522.10
  5. Step 5: Solve for x
    x = 308,522.10/499.19
  6. Step 6: Final answer
    x = 618.05

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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.