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Finding the Fourth Proportional to 288.95, 433.18 and 126.51

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Solution

The fourth proportional to 288.95, 433.18 and 126.51 is: 189.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.95 : 433.18 = 126.51 : x
  2. Step 2: Convert to fraction form
    288.95/433.18 = 126.51/x
  3. Step 3: Cross multiply
    288.95x = 433.18 × 126.51
  4. Step 4: Simplify right side
    288.95x = 54,798.80
  5. Step 5: Solve for x
    x = 54,798.80/288.95
  6. Step 6: Final answer
    x = 189.65

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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.