Home / 2,485.73-3,430.82-1,438.13

Finding the Fourth Proportional to 2,485.73, 3,430.82 and 1,438.13

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Solution

The fourth proportional to 2,485.73, 3,430.82 and 1,438.13 is: 1,984.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.73 : 3,430.82 = 1,438.13 : x
  2. Step 2: Convert to fraction form
    2,485.73/3,430.82 = 1,438.13/x
  3. Step 3: Cross multiply
    2,485.73x = 3,430.82 × 1,438.13
  4. Step 4: Simplify right side
    2,485.73x = 4,933,965.17
  5. Step 5: Solve for x
    x = 4,933,965.17/2,485.73
  6. Step 6: Final answer
    x = 1,984.92

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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.