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Finding the Fourth Proportional to 386,960.52, 578,939.03 and 339,216.49

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Solution

The fourth proportional to 386,960.52, 578,939.03 and 339,216.49 is: 507,508.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,960.52 : 578,939.03 = 339,216.49 : x
  2. Step 2: Convert to fraction form
    386,960.52/578,939.03 = 339,216.49/x
  3. Step 3: Cross multiply
    386,960.52x = 578,939.03 × 339,216.49
  4. Step 4: Simplify right side
    386,960.52x = 196,385,665,980.26
  5. Step 5: Solve for x
    x = 196,385,665,980.26/386,960.52
  6. Step 6: Final answer
    x = 507,508.27

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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.