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Finding the Fourth Proportional to 1,590.43, 2,385.11 and 550.15

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Solution

The fourth proportional to 1,590.43, 2,385.11 and 550.15 is: 825.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.43 : 2,385.11 = 550.15 : x
  2. Step 2: Convert to fraction form
    1,590.43/2,385.11 = 550.15/x
  3. Step 3: Cross multiply
    1,590.43x = 2,385.11 × 550.15
  4. Step 4: Simplify right side
    1,590.43x = 1,312,172.32
  5. Step 5: Solve for x
    x = 1,312,172.32/1,590.43
  6. Step 6: Final answer
    x = 825.04

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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.