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Finding the Fourth Proportional to 3,939,862.80, 5,909,794.20 and 1,415,600.40

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Solution

The fourth proportional to 3,939,862.80, 5,909,794.20 and 1,415,600.40 is: 2,123,400.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939,862.80 : 5,909,794.20 = 1,415,600.40 : x
  2. Step 2: Convert to fraction form
    3,939,862.80/5,909,794.20 = 1,415,600.40/x
  3. Step 3: Cross multiply
    3,939,862.80x = 5,909,794.20 × 1,415,600.40
  4. Step 4: Simplify right side
    3,939,862.80x = 8,365,907,033,437.68
  5. Step 5: Solve for x
    x = 8,365,907,033,437.68/3,939,862.80
  6. Step 6: Final answer
    x = 2,123,400.60

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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.