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Finding the Fourth Proportional to 320,319.65, 442,028.79 and 191,279.81

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Solution

The fourth proportional to 320,319.65, 442,028.79 and 191,279.81 is: 263,958.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,319.65 : 442,028.79 = 191,279.81 : x
  2. Step 2: Convert to fraction form
    320,319.65/442,028.79 = 191,279.81/x
  3. Step 3: Cross multiply
    320,319.65x = 442,028.79 × 191,279.81
  4. Step 4: Simplify right side
    320,319.65x = 84,551,180,755.59
  5. Step 5: Solve for x
    x = 84,551,180,755.59/320,319.65
  6. Step 6: Final answer
    x = 263,958.77

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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.