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Finding the Fourth Proportional to 619.92, 929.84 and 157.68

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Solution

The fourth proportional to 619.92, 929.84 and 157.68 is: 236.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.92 : 929.84 = 157.68 : x
  2. Step 2: Convert to fraction form
    619.92/929.84 = 157.68/x
  3. Step 3: Cross multiply
    619.92x = 929.84 × 157.68
  4. Step 4: Simplify right side
    619.92x = 146,617.17
  5. Step 5: Solve for x
    x = 146,617.17/619.92
  6. Step 6: Final answer
    x = 236.51

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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.