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Finding the Fourth Proportional to 320,005.78, 479,989.11 and 133,018.90

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Solution

The fourth proportional to 320,005.78, 479,989.11 and 133,018.90 is: 199,520.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,005.78 : 479,989.11 = 133,018.90 : x
  2. Step 2: Convert to fraction form
    320,005.78/479,989.11 = 133,018.90/x
  3. Step 3: Cross multiply
    320,005.78x = 479,989.11 × 133,018.90
  4. Step 4: Simplify right side
    320,005.78x = 63,847,623,424.18
  5. Step 5: Solve for x
    x = 63,847,623,424.18/320,005.78
  6. Step 6: Final answer
    x = 199,520.22

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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.