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Finding the Fourth Proportional to 432,393.40, 648,104.10 and 207,861.40

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Solution

The fourth proportional to 432,393.40, 648,104.10 and 207,861.40 is: 311,558.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,393.40 : 648,104.10 = 207,861.40 : x
  2. Step 2: Convert to fraction form
    432,393.40/648,104.10 = 207,861.40/x
  3. Step 3: Cross multiply
    432,393.40x = 648,104.10 × 207,861.40
  4. Step 4: Simplify right side
    432,393.40x = 134,715,825,571.74
  5. Step 5: Solve for x
    x = 134,715,825,571.74/432,393.40
  6. Step 6: Final answer
    x = 311,558.47

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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.