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Finding the Fourth Proportional to 399,212.20, 599,255.70 and 249,621.40

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Solution

The fourth proportional to 399,212.20, 599,255.70 and 249,621.40 is: 374,705.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,212.20 : 599,255.70 = 249,621.40 : x
  2. Step 2: Convert to fraction form
    399,212.20/599,255.70 = 249,621.40/x
  3. Step 3: Cross multiply
    399,212.20x = 599,255.70 × 249,621.40
  4. Step 4: Simplify right side
    399,212.20x = 149,587,046,791.98
  5. Step 5: Solve for x
    x = 149,587,046,791.98/399,212.20
  6. Step 6: Final answer
    x = 374,705.60

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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.