Home / 1,610.40-2,415.12-1,286.40

Finding the Fourth Proportional to 1,610.40, 2,415.12 and 1,286.40

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Solution

The fourth proportional to 1,610.40, 2,415.12 and 1,286.40 is: 1,929.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,610.40 : 2,415.12 = 1,286.40 : x
  2. Step 2: Convert to fraction form
    1,610.40/2,415.12 = 1,286.40/x
  3. Step 3: Cross multiply
    1,610.40x = 2,415.12 × 1,286.40
  4. Step 4: Simplify right side
    1,610.40x = 3,106,810.37
  5. Step 5: Solve for x
    x = 3,106,810.37/1,610.40
  6. Step 6: Final answer
    x = 1,929.22

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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.