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Finding the Fourth Proportional to 288.90, 432.66 and 207.48

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Solution

The fourth proportional to 288.90, 432.66 and 207.48 is: 310.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.90 : 432.66 = 207.48 : x
  2. Step 2: Convert to fraction form
    288.90/432.66 = 207.48/x
  3. Step 3: Cross multiply
    288.90x = 432.66 × 207.48
  4. Step 4: Simplify right side
    288.90x = 89,768.30
  5. Step 5: Solve for x
    x = 89,768.30/288.90
  6. Step 6: Final answer
    x = 310.72

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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.