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Finding the Fourth Proportional to 399,221.70, 598,832.55 and 372,783.30

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Solution

The fourth proportional to 399,221.70, 598,832.55 and 372,783.30 is: 559,174.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,221.70 : 598,832.55 = 372,783.30 : x
  2. Step 2: Convert to fraction form
    399,221.70/598,832.55 = 372,783.30/x
  3. Step 3: Cross multiply
    399,221.70x = 598,832.55 × 372,783.30
  4. Step 4: Simplify right side
    399,221.70x = 223,234,774,136.42
  5. Step 5: Solve for x
    x = 223,234,774,136.42/399,221.70
  6. Step 6: Final answer
    x = 559,174.95

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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.