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Finding the Fourth Proportional to 393,490.80, 589,944.60 and 168,667.20

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Solution

The fourth proportional to 393,490.80, 589,944.60 and 168,667.20 is: 252,875.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,490.80 : 589,944.60 = 168,667.20 : x
  2. Step 2: Convert to fraction form
    393,490.80/589,944.60 = 168,667.20/x
  3. Step 3: Cross multiply
    393,490.80x = 589,944.60 × 168,667.20
  4. Step 4: Simplify right side
    393,490.80x = 99,504,303,837.12
  5. Step 5: Solve for x
    x = 99,504,303,837.12/393,490.80
  6. Step 6: Final answer
    x = 252,875.81

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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.