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Finding the Fourth Proportional to 388,473.30, 536,091.21 and 218,708.64

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Solution

The fourth proportional to 388,473.30, 536,091.21 and 218,708.64 is: 301,816.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,473.30 : 536,091.21 = 218,708.64 : x
  2. Step 2: Convert to fraction form
    388,473.30/536,091.21 = 218,708.64/x
  3. Step 3: Cross multiply
    388,473.30x = 536,091.21 × 218,708.64
  4. Step 4: Simplify right side
    388,473.30x = 117,247,779,455.05
  5. Step 5: Solve for x
    x = 117,247,779,455.05/388,473.30
  6. Step 6: Final answer
    x = 301,816.83

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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.