Home / 1,980.50-2,728.32-1,665.77

Finding the Fourth Proportional to 1,980.50, 2,728.32 and 1,665.77

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Solution

The fourth proportional to 1,980.50, 2,728.32 and 1,665.77 is: 2,294.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.50 : 2,728.32 = 1,665.77 : x
  2. Step 2: Convert to fraction form
    1,980.50/2,728.32 = 1,665.77/x
  3. Step 3: Cross multiply
    1,980.50x = 2,728.32 × 1,665.77
  4. Step 4: Simplify right side
    1,980.50x = 4,544,746.79
  5. Step 5: Solve for x
    x = 4,544,746.79/1,980.50
  6. Step 6: Final answer
    x = 2,294.75

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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.