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Finding the Fourth Proportional to 388,251.17, 535,785.52 and 218,485.29

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Solution

The fourth proportional to 388,251.17, 535,785.52 and 218,485.29 is: 301,509.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,251.17 : 535,785.52 = 218,485.29 : x
  2. Step 2: Convert to fraction form
    388,251.17/535,785.52 = 218,485.29/x
  3. Step 3: Cross multiply
    388,251.17x = 535,785.52 × 218,485.29
  4. Step 4: Simplify right side
    388,251.17x = 117,061,256,587.64
  5. Step 5: Solve for x
    x = 117,061,256,587.64/388,251.17
  6. Step 6: Final answer
    x = 301,509.09

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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.