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Finding the Fourth Proportional to 3,590.80, 5,390.20 and 1,858.96

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Solution

The fourth proportional to 3,590.80, 5,390.20 and 1,858.96 is: 2,790.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,590.80 : 5,390.20 = 1,858.96 : x
  2. Step 2: Convert to fraction form
    3,590.80/5,390.20 = 1,858.96/x
  3. Step 3: Cross multiply
    3,590.80x = 5,390.20 × 1,858.96
  4. Step 4: Simplify right side
    3,590.80x = 10,020,166.19
  5. Step 5: Solve for x
    x = 10,020,166.19/3,590.80
  6. Step 6: Final answer
    x = 2,790.51

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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.