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Finding the Fourth Proportional to 381,296.80, 525,710.82 and 279,144.91

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Solution

The fourth proportional to 381,296.80, 525,710.82 and 279,144.91 is: 384,869.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,296.80 : 525,710.82 = 279,144.91 : x
  2. Step 2: Convert to fraction form
    381,296.80/525,710.82 = 279,144.91/x
  3. Step 3: Cross multiply
    381,296.80x = 525,710.82 × 279,144.91
  4. Step 4: Simplify right side
    381,296.80x = 146,749,499,534.93
  5. Step 5: Solve for x
    x = 146,749,499,534.93/381,296.80
  6. Step 6: Final answer
    x = 384,869.48

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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.