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Finding the Fourth Proportional to 619.51, 929.01 and 208.54

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Solution

The fourth proportional to 619.51, 929.01 and 208.54 is: 312.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.51 : 929.01 = 208.54 : x
  2. Step 2: Convert to fraction form
    619.51/929.01 = 208.54/x
  3. Step 3: Cross multiply
    619.51x = 929.01 × 208.54
  4. Step 4: Simplify right side
    619.51x = 193,735.75
  5. Step 5: Solve for x
    x = 193,735.75/619.51
  6. Step 6: Final answer
    x = 312.72

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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.