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Finding the Fourth Proportional to 388,191.38, 535,703 and 218,425.52

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Solution

The fourth proportional to 388,191.38, 535,703 and 218,425.52 is: 301,426.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,191.38 : 535,703 = 218,425.52 : x
  2. Step 2: Convert to fraction form
    388,191.38/535,703 = 218,425.52/x
  3. Step 3: Cross multiply
    388,191.38x = 535,703 × 218,425.52
  4. Step 4: Simplify right side
    388,191.38x = 117,011,206,340.56
  5. Step 5: Solve for x
    x = 117,011,206,340.56/388,191.38
  6. Step 6: Final answer
    x = 301,426.60

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1.5x scale

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.