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Finding the Fourth Proportional to 453,431.40, 680,172.70 and 137,898.60

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Solution

The fourth proportional to 453,431.40, 680,172.70 and 137,898.60 is: 206,855.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,431.40 : 680,172.70 = 137,898.60 : x
  2. Step 2: Convert to fraction form
    453,431.40/680,172.70 = 137,898.60/x
  3. Step 3: Cross multiply
    453,431.40x = 680,172.70 × 137,898.60
  4. Step 4: Simplify right side
    453,431.40x = 93,794,863,088.22
  5. Step 5: Solve for x
    x = 93,794,863,088.22/453,431.40
  6. Step 6: Final answer
    x = 206,855.69

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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.