Home / 2,123.48-2,930.16-1,238.66

Finding the Fourth Proportional to 2,123.48, 2,930.16 and 1,238.66

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Solution

The fourth proportional to 2,123.48, 2,930.16 and 1,238.66 is: 1,709.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.48 : 2,930.16 = 1,238.66 : x
  2. Step 2: Convert to fraction form
    2,123.48/2,930.16 = 1,238.66/x
  3. Step 3: Cross multiply
    2,123.48x = 2,930.16 × 1,238.66
  4. Step 4: Simplify right side
    2,123.48x = 3,629,471.99
  5. Step 5: Solve for x
    x = 3,629,471.99/2,123.48
  6. Step 6: Final answer
    x = 1,709.21

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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.