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Finding the Fourth Proportional to 393,908.08, 543,591 and 215,058.80

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Solution

The fourth proportional to 393,908.08, 543,591 and 215,058.80 is: 296,779.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,908.08 : 543,591 = 215,058.80 : x
  2. Step 2: Convert to fraction form
    393,908.08/543,591 = 215,058.80/x
  3. Step 3: Cross multiply
    393,908.08x = 543,591 × 215,058.80
  4. Step 4: Simplify right side
    393,908.08x = 116,904,028,150.80
  5. Step 5: Solve for x
    x = 116,904,028,150.80/393,908.08
  6. Step 6: Final answer
    x = 296,779.97

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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.