Home / 1,780.72-2,454.37-1,220.23

Finding the Fourth Proportional to 1,780.72, 2,454.37 and 1,220.23

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Solution

The fourth proportional to 1,780.72, 2,454.37 and 1,220.23 is: 1,681.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.72 : 2,454.37 = 1,220.23 : x
  2. Step 2: Convert to fraction form
    1,780.72/2,454.37 = 1,220.23/x
  3. Step 3: Cross multiply
    1,780.72x = 2,454.37 × 1,220.23
  4. Step 4: Simplify right side
    1,780.72x = 2,994,895.92
  5. Step 5: Solve for x
    x = 2,994,895.92/1,780.72
  6. Step 6: Final answer
    x = 1,681.85

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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.