Home / 1,560.80-2,137.05-1,555.36

Finding the Fourth Proportional to 1,560.80, 2,137.05 and 1,555.36

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Solution

The fourth proportional to 1,560.80, 2,137.05 and 1,555.36 is: 2,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,560.80 : 2,137.05 = 1,555.36 : x
  2. Step 2: Convert to fraction form
    1,560.80/2,137.05 = 1,555.36/x
  3. Step 3: Cross multiply
    1,560.80x = 2,137.05 × 1,555.36
  4. Step 4: Simplify right side
    1,560.80x = 3,323,882.09
  5. Step 5: Solve for x
    x = 3,323,882.09/1,560.80
  6. Step 6: Final answer
    x = 2,129.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.