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Finding the Fourth Proportional to 288.63, 432.35 and 245.49

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Solution

The fourth proportional to 288.63, 432.35 and 245.49 is: 367.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.63 : 432.35 = 245.49 : x
  2. Step 2: Convert to fraction form
    288.63/432.35 = 245.49/x
  3. Step 3: Cross multiply
    288.63x = 432.35 × 245.49
  4. Step 4: Simplify right side
    288.63x = 106,136.37
  5. Step 5: Solve for x
    x = 106,136.37/288.63
  6. Step 6: Final answer
    x = 367.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.