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Finding the Fourth Proportional to 287.52, 397.05 and 245.83

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Solution

The fourth proportional to 287.52, 397.05 and 245.83 is: 339.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.52 : 397.05 = 245.83 : x
  2. Step 2: Convert to fraction form
    287.52/397.05 = 245.83/x
  3. Step 3: Cross multiply
    287.52x = 397.05 × 245.83
  4. Step 4: Simplify right side
    287.52x = 97,606.73
  5. Step 5: Solve for x
    x = 97,606.73/287.52
  6. Step 6: Final answer
    x = 339.48

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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.