Home / 1,430.73-1,974.54-1,138.23

Finding the Fourth Proportional to 1,430.73, 1,974.54 and 1,138.23

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Solution

The fourth proportional to 1,430.73, 1,974.54 and 1,138.23 is: 1,570.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.73 : 1,974.54 = 1,138.23 : x
  2. Step 2: Convert to fraction form
    1,430.73/1,974.54 = 1,138.23/x
  3. Step 3: Cross multiply
    1,430.73x = 1,974.54 × 1,138.23
  4. Step 4: Simplify right side
    1,430.73x = 2,247,480.66
  5. Step 5: Solve for x
    x = 2,247,480.66/1,430.73
  6. Step 6: Final answer
    x = 1,570.86

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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.