Home / 1,980.37-2,731.89-1,607.77

Finding the Fourth Proportional to 1,980.37, 2,731.89 and 1,607.77

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Solution

The fourth proportional to 1,980.37, 2,731.89 and 1,607.77 is: 2,217.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.37 : 2,731.89 = 1,607.77 : x
  2. Step 2: Convert to fraction form
    1,980.37/2,731.89 = 1,607.77/x
  3. Step 3: Cross multiply
    1,980.37x = 2,731.89 × 1,607.77
  4. Step 4: Simplify right side
    1,980.37x = 4,392,250.79
  5. Step 5: Solve for x
    x = 4,392,250.79/1,980.37
  6. Step 6: Final answer
    x = 2,217.89

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1.5x scale

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.