Home / 1,590.12-2,193.42-999.62

Finding the Fourth Proportional to 1,590.12, 2,193.42 and 999.62

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Solution

The fourth proportional to 1,590.12, 2,193.42 and 999.62 is: 1,378.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.12 : 2,193.42 = 999.62 : x
  2. Step 2: Convert to fraction form
    1,590.12/2,193.42 = 999.62/x
  3. Step 3: Cross multiply
    1,590.12x = 2,193.42 × 999.62
  4. Step 4: Simplify right side
    1,590.12x = 2,192,586.50
  5. Step 5: Solve for x
    x = 2,192,586.50/1,590.12
  6. Step 6: Final answer
    x = 1,378.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.