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Finding the Fourth Proportional to 288.76, 431.03 and 250.51

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Solution

The fourth proportional to 288.76, 431.03 and 250.51 is: 373.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.76 : 431.03 = 250.51 : x
  2. Step 2: Convert to fraction form
    288.76/431.03 = 250.51/x
  3. Step 3: Cross multiply
    288.76x = 431.03 × 250.51
  4. Step 4: Simplify right side
    288.76x = 107,977.33
  5. Step 5: Solve for x
    x = 107,977.33/288.76
  6. Step 6: Final answer
    x = 373.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.