Home / 2,421.40-3,630.84-1,121.76

Finding the Fourth Proportional to 2,421.40, 3,630.84 and 1,121.76

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Solution

The fourth proportional to 2,421.40, 3,630.84 and 1,121.76 is: 1,682.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.40 : 3,630.84 = 1,121.76 : x
  2. Step 2: Convert to fraction form
    2,421.40/3,630.84 = 1,121.76/x
  3. Step 3: Cross multiply
    2,421.40x = 3,630.84 × 1,121.76
  4. Step 4: Simplify right side
    2,421.40x = 4,072,931.08
  5. Step 5: Solve for x
    x = 4,072,931.08/2,421.40
  6. Step 6: Final answer
    x = 1,682.06

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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.