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Finding the Fourth Proportional to 344.32, 515.56 and 289.65

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Solution

The fourth proportional to 344.32, 515.56 and 289.65 is: 433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.32 : 515.56 = 289.65 : x
  2. Step 2: Convert to fraction form
    344.32/515.56 = 289.65/x
  3. Step 3: Cross multiply
    344.32x = 515.56 × 289.65
  4. Step 4: Simplify right side
    344.32x = 149,329.38
  5. Step 5: Solve for x
    x = 149,329.38/344.32
  6. Step 6: Final answer
    x = 433.69

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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.