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Finding the Fourth Proportional to 538,728.80, 807,979.80 and 272,238.80

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Solution

The fourth proportional to 538,728.80, 807,979.80 and 272,238.80 is: 408,300.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,728.80 : 807,979.80 = 272,238.80 : x
  2. Step 2: Convert to fraction form
    538,728.80/807,979.80 = 272,238.80/x
  3. Step 3: Cross multiply
    538,728.80x = 807,979.80 × 272,238.80
  4. Step 4: Simplify right side
    538,728.80x = 219,963,451,176.24
  5. Step 5: Solve for x
    x = 219,963,451,176.24/538,728.80
  6. Step 6: Final answer
    x = 408,300.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.