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Finding the Fourth Proportional to 483,223.12, 724,778.38 and 128,264.71

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Solution

The fourth proportional to 483,223.12, 724,778.38 and 128,264.71 is: 192,382.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,223.12 : 724,778.38 = 128,264.71 : x
  2. Step 2: Convert to fraction form
    483,223.12/724,778.38 = 128,264.71/x
  3. Step 3: Cross multiply
    483,223.12x = 724,778.38 × 128,264.71
  4. Step 4: Simplify right side
    483,223.12x = 92,963,488,724.97
  5. Step 5: Solve for x
    x = 92,963,488,724.97/483,223.12
  6. Step 6: Final answer
    x = 192,382.12

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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.