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Finding the Fourth Proportional to 312,601.48, 431,390.46 and 169,361.53

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Solution

The fourth proportional to 312,601.48, 431,390.46 and 169,361.53 is: 233,719.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,601.48 : 431,390.46 = 169,361.53 : x
  2. Step 2: Convert to fraction form
    312,601.48/431,390.46 = 169,361.53/x
  3. Step 3: Cross multiply
    312,601.48x = 431,390.46 × 169,361.53
  4. Step 4: Simplify right side
    312,601.48x = 73,060,948,333.00
  5. Step 5: Solve for x
    x = 73,060,948,333.00/312,601.48
  6. Step 6: Final answer
    x = 233,719.14

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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.