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Finding the Fourth Proportional to 631,039.64, 870,830.34 and 344,559.56

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Solution

The fourth proportional to 631,039.64, 870,830.34 and 344,559.56 is: 475,489.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,039.64 : 870,830.34 = 344,559.56 : x
  2. Step 2: Convert to fraction form
    631,039.64/870,830.34 = 344,559.56/x
  3. Step 3: Cross multiply
    631,039.64x = 870,830.34 × 344,559.56
  4. Step 4: Simplify right side
    631,039.64x = 300,052,918,785.05
  5. Step 5: Solve for x
    x = 300,052,918,785.05/631,039.64
  6. Step 6: Final answer
    x = 475,489.81

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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.