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Finding the Fourth Proportional to 1,408,868.64, 1,944,242.52 and 764,288.88

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Solution

The fourth proportional to 1,408,868.64, 1,944,242.52 and 764,288.88 is: 1,054,720.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408,868.64 : 1,944,242.52 = 764,288.88 : x
  2. Step 2: Convert to fraction form
    1,408,868.64/1,944,242.52 = 764,288.88/x
  3. Step 3: Cross multiply
    1,408,868.64x = 1,944,242.52 × 764,288.88
  4. Step 4: Simplify right side
    1,408,868.64x = 1,485,962,938,059.18
  5. Step 5: Solve for x
    x = 1,485,962,938,059.18/1,408,868.64
  6. Step 6: Final answer
    x = 1,054,720.71

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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.