Home / 2,421.40-3,628.74-1,120.12

Finding the Fourth Proportional to 2,421.40, 3,628.74 and 1,120.12

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Solution

The fourth proportional to 2,421.40, 3,628.74 and 1,120.12 is: 1,678.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.40 : 3,628.74 = 1,120.12 : x
  2. Step 2: Convert to fraction form
    2,421.40/3,628.74 = 1,120.12/x
  3. Step 3: Cross multiply
    2,421.40x = 3,628.74 × 1,120.12
  4. Step 4: Simplify right side
    2,421.40x = 4,064,624.25
  5. Step 5: Solve for x
    x = 4,064,624.25/2,421.40
  6. Step 6: Final answer
    x = 1,678.63

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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.