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Finding the Fourth Proportional to 342,765.66, 472,761.75 and 221,813.64

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Solution

The fourth proportional to 342,765.66, 472,761.75 and 221,813.64 is: 305,937.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,765.66 : 472,761.75 = 221,813.64 : x
  2. Step 2: Convert to fraction form
    342,765.66/472,761.75 = 221,813.64/x
  3. Step 3: Cross multiply
    342,765.66x = 472,761.75 × 221,813.64
  4. Step 4: Simplify right side
    342,765.66x = 104,865,004,620.27
  5. Step 5: Solve for x
    x = 104,865,004,620.27/342,765.66
  6. Step 6: Final answer
    x = 305,937.90

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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.