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Finding the Fourth Proportional to 347,385, 479,391.30 and 196,478.76

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Solution

The fourth proportional to 347,385, 479,391.30 and 196,478.76 is: 271,140.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,385 : 479,391.30 = 196,478.76 : x
  2. Step 2: Convert to fraction form
    347,385/479,391.30 = 196,478.76/x
  3. Step 3: Cross multiply
    347,385x = 479,391.30 × 196,478.76
  4. Step 4: Simplify right side
    347,385x = 94,190,208,178.79
  5. Step 5: Solve for x
    x = 94,190,208,178.79/347,385
  6. Step 6: Final answer
    x = 271,140.69

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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.