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Finding the Fourth Proportional to 485,701.37, 728,111 and 169,986.05

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Solution

The fourth proportional to 485,701.37, 728,111 and 169,986.05 is: 254,824.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,701.37 : 728,111 = 169,986.05 : x
  2. Step 2: Convert to fraction form
    485,701.37/728,111 = 169,986.05/x
  3. Step 3: Cross multiply
    485,701.37x = 728,111 × 169,986.05
  4. Step 4: Simplify right side
    485,701.37x = 123,768,709,211.00
  5. Step 5: Solve for x
    x = 123,768,709,211.00/485,701.37
  6. Step 6: Final answer
    x = 254,824.71

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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.