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Finding the Fourth Proportional to 6,418,892.04, 8,858,978.28 and 3,972,291.10

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Solution

The fourth proportional to 6,418,892.04, 8,858,978.28 and 3,972,291.10 is: 5,482,323.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,418,892.04 : 8,858,978.28 = 3,972,291.10 : x
  2. Step 2: Convert to fraction form
    6,418,892.04/8,858,978.28 = 3,972,291.10/x
  3. Step 3: Cross multiply
    6,418,892.04x = 8,858,978.28 × 3,972,291.10
  4. Step 4: Simplify right side
    6,418,892.04x = 35,190,440,576,737.30
  5. Step 5: Solve for x
    x = 35,190,440,576,737.30/6,418,892.04
  6. Step 6: Final answer
    x = 5,482,323.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.