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Finding the Fourth Proportional to 297,619.20, 445,858.56 and 287,614.08

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Solution

The fourth proportional to 297,619.20, 445,858.56 and 287,614.08 is: 430,870.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,619.20 : 445,858.56 = 287,614.08 : x
  2. Step 2: Convert to fraction form
    297,619.20/445,858.56 = 287,614.08/x
  3. Step 3: Cross multiply
    297,619.20x = 445,858.56 × 287,614.08
  4. Step 4: Simplify right side
    297,619.20x = 128,235,199,544.53
  5. Step 5: Solve for x
    x = 128,235,199,544.53/297,619.20
  6. Step 6: Final answer
    x = 430,870.05

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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.