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Finding the Fourth Proportional to 342,338.76, 472,268.29 and 221,519.05

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Solution

The fourth proportional to 342,338.76, 472,268.29 and 221,519.05 is: 305,593.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,338.76 : 472,268.29 = 221,519.05 : x
  2. Step 2: Convert to fraction form
    342,338.76/472,268.29 = 221,519.05/x
  3. Step 3: Cross multiply
    342,338.76x = 472,268.29 × 221,519.05
  4. Step 4: Simplify right side
    342,338.76x = 104,616,422,945.92
  5. Step 5: Solve for x
    x = 104,616,422,945.92/342,338.76
  6. Step 6: Final answer
    x = 305,593.28

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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.