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Finding the Fourth Proportional to 342,769.62, 472,965.75 and 215,355

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Solution

The fourth proportional to 342,769.62, 472,965.75 and 215,355 is: 297,154.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,769.62 : 472,965.75 = 215,355 : x
  2. Step 2: Convert to fraction form
    342,769.62/472,965.75 = 215,355/x
  3. Step 3: Cross multiply
    342,769.62x = 472,965.75 × 215,355
  4. Step 4: Simplify right side
    342,769.62x = 101,855,539,091.25
  5. Step 5: Solve for x
    x = 101,855,539,091.25/342,769.62
  6. Step 6: Final answer
    x = 297,154.51

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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.