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Finding the Fourth Proportional to 255,411.36, 352,288.44 and 221,360.04

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Solution

The fourth proportional to 255,411.36, 352,288.44 and 221,360.04 is: 305,321.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,411.36 : 352,288.44 = 221,360.04 : x
  2. Step 2: Convert to fraction form
    255,411.36/352,288.44 = 221,360.04/x
  3. Step 3: Cross multiply
    255,411.36x = 352,288.44 × 221,360.04
  4. Step 4: Simplify right side
    255,411.36x = 77,982,583,169.94
  5. Step 5: Solve for x
    x = 77,982,583,169.94/255,411.36
  6. Step 6: Final answer
    x = 305,321.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.