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Finding the Fourth Proportional to 485,683.48, 728,612.88 and 219,569.32

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Solution

The fourth proportional to 485,683.48, 728,612.88 and 219,569.32 is: 329,393.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,683.48 : 728,612.88 = 219,569.32 : x
  2. Step 2: Convert to fraction form
    485,683.48/728,612.88 = 219,569.32/x
  3. Step 3: Cross multiply
    485,683.48x = 728,612.88 × 219,569.32
  4. Step 4: Simplify right side
    485,683.48x = 159,981,034,604.84
  5. Step 5: Solve for x
    x = 159,981,034,604.84/485,683.48
  6. Step 6: Final answer
    x = 329,393.61

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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.