Home / 1,620.08-2,429.75-580.15

Finding the Fourth Proportional to 1,620.08, 2,429.75 and 580.15

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Solution

The fourth proportional to 1,620.08, 2,429.75 and 580.15 is: 870.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.08 : 2,429.75 = 580.15 : x
  2. Step 2: Convert to fraction form
    1,620.08/2,429.75 = 580.15/x
  3. Step 3: Cross multiply
    1,620.08x = 2,429.75 × 580.15
  4. Step 4: Simplify right side
    1,620.08x = 1,409,614.84
  5. Step 5: Solve for x
    x = 1,409,614.84/1,620.08
  6. Step 6: Final answer
    x = 870.09

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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.