Home / 1,258.42-1,731.54-1,226.23

Finding the Fourth Proportional to 1,258.42, 1,731.54 and 1,226.23

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Solution

The fourth proportional to 1,258.42, 1,731.54 and 1,226.23 is: 1,687.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.42 : 1,731.54 = 1,226.23 : x
  2. Step 2: Convert to fraction form
    1,258.42/1,731.54 = 1,226.23/x
  3. Step 3: Cross multiply
    1,258.42x = 1,731.54 × 1,226.23
  4. Step 4: Simplify right side
    1,258.42x = 2,123,266.29
  5. Step 5: Solve for x
    x = 2,123,266.29/1,258.42
  6. Step 6: Final answer
    x = 1,687.25

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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.