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Finding the Fourth Proportional to 3,987,308.08, 5,978,860.40 and 1,740,821.68

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Solution

The fourth proportional to 3,987,308.08, 5,978,860.40 and 1,740,821.68 is: 2,610,314.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987,308.08 : 5,978,860.40 = 1,740,821.68 : x
  2. Step 2: Convert to fraction form
    3,987,308.08/5,978,860.40 = 1,740,821.68/x
  3. Step 3: Cross multiply
    3,987,308.08x = 5,978,860.40 × 1,740,821.68
  4. Step 4: Simplify right side
    3,987,308.08x = 10,408,129,806,013.47
  5. Step 5: Solve for x
    x = 10,408,129,806,013.47/3,987,308.08
  6. Step 6: Final answer
    x = 2,610,314.93

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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.