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Finding the Fourth Proportional to 490,412.56, 731,327.18 and 485,928.28

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Solution

The fourth proportional to 490,412.56, 731,327.18 and 485,928.28 is: 724,640.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,412.56 : 731,327.18 = 485,928.28 : x
  2. Step 2: Convert to fraction form
    490,412.56/731,327.18 = 485,928.28/x
  3. Step 3: Cross multiply
    490,412.56x = 731,327.18 × 485,928.28
  4. Step 4: Simplify right side
    490,412.56x = 355,372,558,694.65
  5. Step 5: Solve for x
    x = 355,372,558,694.65/490,412.56
  6. Step 6: Final answer
    x = 724,640.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.