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Finding the Fourth Proportional to 305,427.60, 421,708.68 and 203,693.22

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Solution

The fourth proportional to 305,427.60, 421,708.68 and 203,693.22 is: 281,242.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,427.60 : 421,708.68 = 203,693.22 : x
  2. Step 2: Convert to fraction form
    305,427.60/421,708.68 = 203,693.22/x
  3. Step 3: Cross multiply
    305,427.60x = 421,708.68 × 203,693.22
  4. Step 4: Simplify right side
    305,427.60x = 85,899,198,931.15
  5. Step 5: Solve for x
    x = 85,899,198,931.15/305,427.60
  6. Step 6: Final answer
    x = 281,242.43

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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.