Home / 1,620.08-2,430.32-695.76

Finding the Fourth Proportional to 1,620.08, 2,430.32 and 695.76

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Solution

The fourth proportional to 1,620.08, 2,430.32 and 695.76 is: 1,043.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.08 : 2,430.32 = 695.76 : x
  2. Step 2: Convert to fraction form
    1,620.08/2,430.32 = 695.76/x
  3. Step 3: Cross multiply
    1,620.08x = 2,430.32 × 695.76
  4. Step 4: Simplify right side
    1,620.08x = 1,690,919.44
  5. Step 5: Solve for x
    x = 1,690,919.44/1,620.08
  6. Step 6: Final answer
    x = 1,043.73

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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.