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Finding the Fourth Proportional to 388,782.54, 536,454.86 and 216,662.81

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Solution

The fourth proportional to 388,782.54, 536,454.86 and 216,662.81 is: 298,958.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,782.54 : 536,454.86 = 216,662.81 : x
  2. Step 2: Convert to fraction form
    388,782.54/536,454.86 = 216,662.81/x
  3. Step 3: Cross multiply
    388,782.54x = 536,454.86 × 216,662.81
  4. Step 4: Simplify right side
    388,782.54x = 116,229,813,640.17
  5. Step 5: Solve for x
    x = 116,229,813,640.17/388,782.54
  6. Step 6: Final answer
    x = 298,958.42

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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.