Home / 3,985,820.20-5,979,605.10-1,289,686.60

Finding the Fourth Proportional to 3,985,820.20, 5,979,605.10 and 1,289,686.60

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Solution

The fourth proportional to 3,985,820.20, 5,979,605.10 and 1,289,686.60 is: 1,934,812.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985,820.20 : 5,979,605.10 = 1,289,686.60 : x
  2. Step 2: Convert to fraction form
    3,985,820.20/5,979,605.10 = 1,289,686.60/x
  3. Step 3: Cross multiply
    3,985,820.20x = 5,979,605.10 × 1,289,686.60
  4. Step 4: Simplify right side
    3,985,820.20x = 7,711,816,570,761.66
  5. Step 5: Solve for x
    x = 7,711,816,570,761.66/3,985,820.20
  6. Step 6: Final answer
    x = 1,934,812.96

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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.