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Finding the Fourth Proportional to 768,388.92, 1,151,614.41 and 389,404.90

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Solution

The fourth proportional to 768,388.92, 1,151,614.41 and 389,404.90 is: 583,616.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,388.92 : 1,151,614.41 = 389,404.90 : x
  2. Step 2: Convert to fraction form
    768,388.92/1,151,614.41 = 389,404.90/x
  3. Step 3: Cross multiply
    768,388.92x = 1,151,614.41 × 389,404.90
  4. Step 4: Simplify right side
    768,388.92x = 448,444,294,164.61
  5. Step 5: Solve for x
    x = 448,444,294,164.61/768,388.92
  6. Step 6: Final answer
    x = 583,616.29

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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.