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Finding the Fourth Proportional to 312,485.50, 431,230.00 and 169,245.55

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Solution

The fourth proportional to 312,485.50, 431,230.00 and 169,245.55 is: 233,558.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,485.50 : 431,230.00 = 169,245.55 : x
  2. Step 2: Convert to fraction form
    312,485.50/431,230.00 = 169,245.55/x
  3. Step 3: Cross multiply
    312,485.50x = 431,230.00 × 169,245.55
  4. Step 4: Simplify right side
    312,485.50x = 72,983,759,435.76
  5. Step 5: Solve for x
    x = 72,983,759,435.76/312,485.50
  6. Step 6: Final answer
    x = 233,558.87

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1.5x scale

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.