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Finding the Fourth Proportional to 290,332.70, 400,645.59 and 161,279.54

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Solution

The fourth proportional to 290,332.70, 400,645.59 and 161,279.54 is: 222,558.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,332.70 : 400,645.59 = 161,279.54 : x
  2. Step 2: Convert to fraction form
    290,332.70/400,645.59 = 161,279.54/x
  3. Step 3: Cross multiply
    290,332.70x = 400,645.59 × 161,279.54
  4. Step 4: Simplify right side
    290,332.70x = 64,615,936,458.23
  5. Step 5: Solve for x
    x = 64,615,936,458.23/290,332.70
  6. Step 6: Final answer
    x = 222,558.24

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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.