Home / 1,620.18-2,429.91-580.18

Finding the Fourth Proportional to 1,620.18, 2,429.91 and 580.18

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Solution

The fourth proportional to 1,620.18, 2,429.91 and 580.18 is: 870.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.18 : 2,429.91 = 580.18 : x
  2. Step 2: Convert to fraction form
    1,620.18/2,429.91 = 580.18/x
  3. Step 3: Cross multiply
    1,620.18x = 2,429.91 × 580.18
  4. Step 4: Simplify right side
    1,620.18x = 1,409,770.13
  5. Step 5: Solve for x
    x = 1,409,770.13/1,620.18
  6. Step 6: Final answer
    x = 870.13

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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.