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Finding the Fourth Proportional to 288,245.40, 431,201.70 and 253,253.40

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Solution

The fourth proportional to 288,245.40, 431,201.70 and 253,253.40 is: 378,855.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,245.40 : 431,201.70 = 253,253.40 : x
  2. Step 2: Convert to fraction form
    288,245.40/431,201.70 = 253,253.40/x
  3. Step 3: Cross multiply
    288,245.40x = 431,201.70 × 253,253.40
  4. Step 4: Simplify right side
    288,245.40x = 109,203,296,610.78
  5. Step 5: Solve for x
    x = 109,203,296,610.78/288,245.40
  6. Step 6: Final answer
    x = 378,855.30

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1.5x scale

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.