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Finding the Fourth Proportional to 880.50, 1,319.89 and 490.69

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Solution

The fourth proportional to 880.50, 1,319.89 and 490.69 is: 735.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.50 : 1,319.89 = 490.69 : x
  2. Step 2: Convert to fraction form
    880.50/1,319.89 = 490.69/x
  3. Step 3: Cross multiply
    880.50x = 1,319.89 × 490.69
  4. Step 4: Simplify right side
    880.50x = 647,656.82
  5. Step 5: Solve for x
    x = 647,656.82/880.50
  6. Step 6: Final answer
    x = 735.56

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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.