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Finding the Fourth Proportional to 1,590.66, 2,385.36 and 550.44

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Solution

The fourth proportional to 1,590.66, 2,385.36 and 550.44 is: 825.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.66 : 2,385.36 = 550.44 : x
  2. Step 2: Convert to fraction form
    1,590.66/2,385.36 = 550.44/x
  3. Step 3: Cross multiply
    1,590.66x = 2,385.36 × 550.44
  4. Step 4: Simplify right side
    1,590.66x = 1,312,997.56
  5. Step 5: Solve for x
    x = 1,312,997.56/1,590.66
  6. Step 6: Final answer
    x = 825.44

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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.