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Finding the Fourth Proportional to 453,956.40, 680,861.70 and 138,339.90

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Solution

The fourth proportional to 453,956.40, 680,861.70 and 138,339.90 is: 207,487.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,956.40 : 680,861.70 = 138,339.90 : x
  2. Step 2: Convert to fraction form
    453,956.40/680,861.70 = 138,339.90/x
  3. Step 3: Cross multiply
    453,956.40x = 680,861.70 × 138,339.90
  4. Step 4: Simplify right side
    453,956.40x = 94,190,339,491.83
  5. Step 5: Solve for x
    x = 94,190,339,491.83/453,956.40
  6. Step 6: Final answer
    x = 207,487.63

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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.