Home / 1,580.19-2,180.57-872.03

Finding the Fourth Proportional to 1,580.19, 2,180.57 and 872.03

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Solution

The fourth proportional to 1,580.19, 2,180.57 and 872.03 is: 1,203.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.19 : 2,180.57 = 872.03 : x
  2. Step 2: Convert to fraction form
    1,580.19/2,180.57 = 872.03/x
  3. Step 3: Cross multiply
    1,580.19x = 2,180.57 × 872.03
  4. Step 4: Simplify right side
    1,580.19x = 1,901,523.55
  5. Step 5: Solve for x
    x = 1,901,523.55/1,580.19
  6. Step 6: Final answer
    x = 1,203.35

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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.