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Finding the Fourth Proportional to 288.09, 433.80 and 207.50

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Solution

The fourth proportional to 288.09, 433.80 and 207.50 is: 312.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.09 : 433.80 = 207.50 : x
  2. Step 2: Convert to fraction form
    288.09/433.80 = 207.50/x
  3. Step 3: Cross multiply
    288.09x = 433.80 × 207.50
  4. Step 4: Simplify right side
    288.09x = 90,011.33
  5. Step 5: Solve for x
    x = 90,011.33/288.09
  6. Step 6: Final answer
    x = 312.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.