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Finding the Fourth Proportional to 3,985,411.60, 5,978,117.40 and 2,639,094.40

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Solution

The fourth proportional to 3,985,411.60, 5,978,117.40 and 2,639,094.40 is: 3,958,641.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985,411.60 : 5,978,117.40 = 2,639,094.40 : x
  2. Step 2: Convert to fraction form
    3,985,411.60/5,978,117.40 = 2,639,094.40/x
  3. Step 3: Cross multiply
    3,985,411.60x = 5,978,117.40 × 2,639,094.40
  4. Step 4: Simplify right side
    3,985,411.60x = 15,776,816,152,882.56
  5. Step 5: Solve for x
    x = 15,776,816,152,882.56/3,985,411.60
  6. Step 6: Final answer
    x = 3,958,641.60

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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.