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Finding the Fourth Proportional to 485,901.36, 728,599.32 and 219,534.48

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Solution

The fourth proportional to 485,901.36, 728,599.32 and 219,534.48 is: 329,187.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,901.36 : 728,599.32 = 219,534.48 : x
  2. Step 2: Convert to fraction form
    485,901.36/728,599.32 = 219,534.48/x
  3. Step 3: Cross multiply
    485,901.36x = 728,599.32 × 219,534.48
  4. Step 4: Simplify right side
    485,901.36x = 159,952,672,844.55
  5. Step 5: Solve for x
    x = 159,952,672,844.55/485,901.36
  6. Step 6: Final answer
    x = 329,187.54

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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.