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Finding the Fourth Proportional to 407,571.20, 611,113.80 and 249,912.80

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Solution

The fourth proportional to 407,571.20, 611,113.80 and 249,912.80 is: 374,720.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,571.20 : 611,113.80 = 249,912.80 : x
  2. Step 2: Convert to fraction form
    407,571.20/611,113.80 = 249,912.80/x
  3. Step 3: Cross multiply
    407,571.20x = 611,113.80 × 249,912.80
  4. Step 4: Simplify right side
    407,571.20x = 152,725,160,876.64
  5. Step 5: Solve for x
    x = 152,725,160,876.64/407,571.20
  6. Step 6: Final answer
    x = 374,720.20

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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.