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Finding the Fourth Proportional to 431,245.50, 646,012.59 and 203,228.88

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Solution

The fourth proportional to 431,245.50, 646,012.59 and 203,228.88 is: 304,440.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,245.50 : 646,012.59 = 203,228.88 : x
  2. Step 2: Convert to fraction form
    431,245.50/646,012.59 = 203,228.88/x
  3. Step 3: Cross multiply
    431,245.50x = 646,012.59 × 203,228.88
  4. Step 4: Simplify right side
    431,245.50x = 131,288,415,131.60
  5. Step 5: Solve for x
    x = 131,288,415,131.60/431,245.50
  6. Step 6: Final answer
    x = 304,440.08

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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.