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Finding the Fourth Proportional to 463,939.80, 640,545.30 and 356,317.50

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Solution

The fourth proportional to 463,939.80, 640,545.30 and 356,317.50 is: 491,954.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,939.80 : 640,545.30 = 356,317.50 : x
  2. Step 2: Convert to fraction form
    463,939.80/640,545.30 = 356,317.50/x
  3. Step 3: Cross multiply
    463,939.80x = 640,545.30 × 356,317.50
  4. Step 4: Simplify right side
    463,939.80x = 228,237,499,932.75
  5. Step 5: Solve for x
    x = 228,237,499,932.75/463,939.80
  6. Step 6: Final answer
    x = 491,954.99

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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.