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Finding the Fourth Proportional to 619.80, 929.80 and 235.08

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Solution

The fourth proportional to 619.80, 929.80 and 235.08 is: 352.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.80 : 929.80 = 235.08 : x
  2. Step 2: Convert to fraction form
    619.80/929.80 = 235.08/x
  3. Step 3: Cross multiply
    619.80x = 929.80 × 235.08
  4. Step 4: Simplify right side
    619.80x = 218,577.38
  5. Step 5: Solve for x
    x = 218,577.38/619.80
  6. Step 6: Final answer
    x = 352.66

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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.