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Finding the Fourth Proportional to 399,211.20, 599,254.20 and 249,620.40

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Solution

The fourth proportional to 399,211.20, 599,254.20 and 249,620.40 is: 374,704.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,211.20 : 599,254.20 = 249,620.40 : x
  2. Step 2: Convert to fraction form
    399,211.20/599,254.20 = 249,620.40/x
  3. Step 3: Cross multiply
    399,211.20x = 599,254.20 × 249,620.40
  4. Step 4: Simplify right side
    399,211.20x = 149,586,073,105.68
  5. Step 5: Solve for x
    x = 149,586,073,105.68/399,211.20
  6. Step 6: Final answer
    x = 374,704.10

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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.