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Finding the Fourth Proportional to 291,710.40, 436,399.20 and 252,700.80

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Solution

The fourth proportional to 291,710.40, 436,399.20 and 252,700.80 is: 378,040.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,710.40 : 436,399.20 = 252,700.80 : x
  2. Step 2: Convert to fraction form
    291,710.40/436,399.20 = 252,700.80/x
  3. Step 3: Cross multiply
    291,710.40x = 436,399.20 × 252,700.80
  4. Step 4: Simplify right side
    291,710.40x = 110,278,426,959.36
  5. Step 5: Solve for x
    x = 110,278,426,959.36/291,710.40
  6. Step 6: Final answer
    x = 378,040.78

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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.