Home / 1,947.19-2,920.75-486.35

Finding the Fourth Proportional to 1,947.19, 2,920.75 and 486.35

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Solution

The fourth proportional to 1,947.19, 2,920.75 and 486.35 is: 729.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.19 : 2,920.75 = 486.35 : x
  2. Step 2: Convert to fraction form
    1,947.19/2,920.75 = 486.35/x
  3. Step 3: Cross multiply
    1,947.19x = 2,920.75 × 486.35
  4. Step 4: Simplify right side
    1,947.19x = 1,420,504.33
  5. Step 5: Solve for x
    x = 1,420,504.33/1,947.19
  6. Step 6: Final answer
    x = 729.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.