Home / 3,220.80-4,828.56-1,370.40

Finding the Fourth Proportional to 3,220.80, 4,828.56 and 1,370.40

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Solution

The fourth proportional to 3,220.80, 4,828.56 and 1,370.40 is: 2,054.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,220.80 : 4,828.56 = 1,370.40 : x
  2. Step 2: Convert to fraction form
    3,220.80/4,828.56 = 1,370.40/x
  3. Step 3: Cross multiply
    3,220.80x = 4,828.56 × 1,370.40
  4. Step 4: Simplify right side
    3,220.80x = 6,617,058.62
  5. Step 5: Solve for x
    x = 6,617,058.62/3,220.80
  6. Step 6: Final answer
    x = 2,054.48

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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.