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Finding the Fourth Proportional to 2,645,978.40, 3,964,885.20 and 1,968,883.20

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Solution

The fourth proportional to 2,645,978.40, 3,964,885.20 and 1,968,883.20 is: 2,950,287.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,645,978.40 : 3,964,885.20 = 1,968,883.20 : x
  2. Step 2: Convert to fraction form
    2,645,978.40/3,964,885.20 = 1,968,883.20/x
  3. Step 3: Cross multiply
    2,645,978.40x = 3,964,885.20 × 1,968,883.20
  4. Step 4: Simplify right side
    2,645,978.40x = 7,806,395,860,208.64
  5. Step 5: Solve for x
    x = 7,806,395,860,208.64/2,645,978.40
  6. Step 6: Final answer
    x = 2,950,287.07

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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.