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Finding the Fourth Proportional to 485,172.60, 727,499.70 and 169,639.80

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Solution

The fourth proportional to 485,172.60, 727,499.70 and 169,639.80 is: 254,369.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,172.60 : 727,499.70 = 169,639.80 : x
  2. Step 2: Convert to fraction form
    485,172.60/727,499.70 = 169,639.80/x
  3. Step 3: Cross multiply
    485,172.60x = 727,499.70 × 169,639.80
  4. Step 4: Simplify right side
    485,172.60x = 123,412,903,608.06
  5. Step 5: Solve for x
    x = 123,412,903,608.06/485,172.60
  6. Step 6: Final answer
    x = 254,369.07

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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.