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Finding the Fourth Proportional to 342,339.57, 472,269.42 and 221,519.86

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Solution

The fourth proportional to 342,339.57, 472,269.42 and 221,519.86 is: 305,594.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,339.57 : 472,269.42 = 221,519.86 : x
  2. Step 2: Convert to fraction form
    342,339.57/472,269.42 = 221,519.86/x
  3. Step 3: Cross multiply
    342,339.57x = 472,269.42 × 221,519.86
  4. Step 4: Simplify right side
    342,339.57x = 104,617,054,620.01
  5. Step 5: Solve for x
    x = 104,617,054,620.01/342,339.57
  6. Step 6: Final answer
    x = 305,594.40

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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.