Home / 1,930.72-2,666.36-1,664.64

Finding the Fourth Proportional to 1,930.72, 2,666.36 and 1,664.64

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Solution

The fourth proportional to 1,930.72, 2,666.36 and 1,664.64 is: 2,298.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,930.72 : 2,666.36 = 1,664.64 : x
  2. Step 2: Convert to fraction form
    1,930.72/2,666.36 = 1,664.64/x
  3. Step 3: Cross multiply
    1,930.72x = 2,666.36 × 1,664.64
  4. Step 4: Simplify right side
    1,930.72x = 4,438,529.51
  5. Step 5: Solve for x
    x = 4,438,529.51/1,930.72
  6. Step 6: Final answer
    x = 2,298.90

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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.