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Finding the Fourth Proportional to 619.56, 929.40 and 474.84

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Solution

The fourth proportional to 619.56, 929.40 and 474.84 is: 712.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.56 : 929.40 = 474.84 : x
  2. Step 2: Convert to fraction form
    619.56/929.40 = 474.84/x
  3. Step 3: Cross multiply
    619.56x = 929.40 × 474.84
  4. Step 4: Simplify right side
    619.56x = 441,316.30
  5. Step 5: Solve for x
    x = 441,316.30/619.56
  6. Step 6: Final answer
    x = 712.31

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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.