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Finding the Fourth Proportional to 485,812.50, 728,812.16 and 186,269.72

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Solution

The fourth proportional to 485,812.50, 728,812.16 and 186,269.72 is: 279,440.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,812.50 : 728,812.16 = 186,269.72 : x
  2. Step 2: Convert to fraction form
    485,812.50/728,812.16 = 186,269.72/x
  3. Step 3: Cross multiply
    485,812.50x = 728,812.16 × 186,269.72
  4. Step 4: Simplify right side
    485,812.50x = 135,755,632,400.39
  5. Step 5: Solve for x
    x = 135,755,632,400.39/485,812.50
  6. Step 6: Final answer
    x = 279,440.39

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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.