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Finding the Fourth Proportional to 3,994,978.98, 5,513,071.18 and 2,159,431.24

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Solution

The fourth proportional to 3,994,978.98, 5,513,071.18 and 2,159,431.24 is: 2,980,015.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,994,978.98 : 5,513,071.18 = 2,159,431.24 : x
  2. Step 2: Convert to fraction form
    3,994,978.98/5,513,071.18 = 2,159,431.24/x
  3. Step 3: Cross multiply
    3,994,978.98x = 5,513,071.18 × 2,159,431.24
  4. Step 4: Simplify right side
    3,994,978.98x = 11,905,098,134,435.66
  5. Step 5: Solve for x
    x = 11,905,098,134,435.66/3,994,978.98
  6. Step 6: Final answer
    x = 2,980,015.21

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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.