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Finding the Fourth Proportional to 388,121.94, 535,614.32 and 216,041.79

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Solution

The fourth proportional to 388,121.94, 535,614.32 and 216,041.79 is: 298,141.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,121.94 : 535,614.32 = 216,041.79 : x
  2. Step 2: Convert to fraction form
    388,121.94/535,614.32 = 216,041.79/x
  3. Step 3: Cross multiply
    388,121.94x = 535,614.32 × 216,041.79
  4. Step 4: Simplify right side
    388,121.94x = 115,715,077,484.68
  5. Step 5: Solve for x
    x = 115,715,077,484.68/388,121.94
  6. Step 6: Final answer
    x = 298,141.04

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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.