Home / 1,628.10-2,235.60-1,555.20

Finding the Fourth Proportional to 1,628.10, 2,235.60 and 1,555.20

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Solution

The fourth proportional to 1,628.10, 2,235.60 and 1,555.20 is: 2,135.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.10 : 2,235.60 = 1,555.20 : x
  2. Step 2: Convert to fraction form
    1,628.10/2,235.60 = 1,555.20/x
  3. Step 3: Cross multiply
    1,628.10x = 2,235.60 × 1,555.20
  4. Step 4: Simplify right side
    1,628.10x = 3,476,805.12
  5. Step 5: Solve for x
    x = 3,476,805.12/1,628.10
  6. Step 6: Final answer
    x = 2,135.50

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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.