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Finding the Fourth Proportional to 619.56, 929.16 and 286.05

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Solution

The fourth proportional to 619.56, 929.16 and 286.05 is: 428.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.56 : 929.16 = 286.05 : x
  2. Step 2: Convert to fraction form
    619.56/929.16 = 286.05/x
  3. Step 3: Cross multiply
    619.56x = 929.16 × 286.05
  4. Step 4: Simplify right side
    619.56x = 265,786.22
  5. Step 5: Solve for x
    x = 265,786.22/619.56
  6. Step 6: Final answer
    x = 428.99

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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.