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Finding the Fourth Proportional to 326,870.40, 490,305.60 and 149,723.40

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Solution

The fourth proportional to 326,870.40, 490,305.60 and 149,723.40 is: 224,585.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,870.40 : 490,305.60 = 149,723.40 : x
  2. Step 2: Convert to fraction form
    326,870.40/490,305.60 = 149,723.40/x
  3. Step 3: Cross multiply
    326,870.40x = 490,305.60 × 149,723.40
  4. Step 4: Simplify right side
    326,870.40x = 73,410,221,471.04
  5. Step 5: Solve for x
    x = 73,410,221,471.04/326,870.40
  6. Step 6: Final answer
    x = 224,585.10

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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.