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Finding the Fourth Proportional to 3,939,903.40, 5,909,855.10 and 3,915,020.20

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Solution

The fourth proportional to 3,939,903.40, 5,909,855.10 and 3,915,020.20 is: 5,872,530.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939,903.40 : 5,909,855.10 = 3,915,020.20 : x
  2. Step 2: Convert to fraction form
    3,939,903.40/5,909,855.10 = 3,915,020.20/x
  3. Step 3: Cross multiply
    3,939,903.40x = 5,909,855.10 × 3,915,020.20
  4. Step 4: Simplify right side
    3,939,903.40x = 23,137,202,095,573.02
  5. Step 5: Solve for x
    x = 23,137,202,095,573.02/3,939,903.40
  6. Step 6: Final answer
    x = 5,872,530.30

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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.