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Finding the Fourth Proportional to 347,221.63, 479,240.78 and 211,299.36

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Solution

The fourth proportional to 347,221.63, 479,240.78 and 211,299.36 is: 291,638.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,221.63 : 479,240.78 = 211,299.36 : x
  2. Step 2: Convert to fraction form
    347,221.63/479,240.78 = 211,299.36/x
  3. Step 3: Cross multiply
    347,221.63x = 479,240.78 × 211,299.36
  4. Step 4: Simplify right side
    347,221.63x = 101,263,272,029.12
  5. Step 5: Solve for x
    x = 101,263,272,029.12/347,221.63
  6. Step 6: Final answer
    x = 291,638.72

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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.