Home / 1,621.29-2,238.40-1,123.74

Finding the Fourth Proportional to 1,621.29, 2,238.40 and 1,123.74

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Solution

The fourth proportional to 1,621.29, 2,238.40 and 1,123.74 is: 1,551.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.29 : 2,238.40 = 1,123.74 : x
  2. Step 2: Convert to fraction form
    1,621.29/2,238.40 = 1,123.74/x
  3. Step 3: Cross multiply
    1,621.29x = 2,238.40 × 1,123.74
  4. Step 4: Simplify right side
    1,621.29x = 2,515,385.20
  5. Step 5: Solve for x
    x = 2,515,385.20/1,621.29
  6. Step 6: Final answer
    x = 1,551.48

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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.