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Finding the Fourth Proportional to 388,017.34, 535,458.45 and 218,251.42

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Solution

The fourth proportional to 388,017.34, 535,458.45 and 218,251.42 is: 301,183.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,017.34 : 535,458.45 = 218,251.42 : x
  2. Step 2: Convert to fraction form
    388,017.34/535,458.45 = 218,251.42/x
  3. Step 3: Cross multiply
    388,017.34x = 535,458.45 × 218,251.42
  4. Step 4: Simplify right side
    388,017.34x = 116,864,567,063.50
  5. Step 5: Solve for x
    x = 116,864,567,063.50/388,017.34
  6. Step 6: Final answer
    x = 301,183.88

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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.