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Finding the Fourth Proportional to 288.39, 397.80 and 177.83

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Solution

The fourth proportional to 288.39, 397.80 and 177.83 is: 245.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.39 : 397.80 = 177.83 : x
  2. Step 2: Convert to fraction form
    288.39/397.80 = 177.83/x
  3. Step 3: Cross multiply
    288.39x = 397.80 × 177.83
  4. Step 4: Simplify right side
    288.39x = 70,740.77
  5. Step 5: Solve for x
    x = 70,740.77/288.39
  6. Step 6: Final answer
    x = 245.30

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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.