Home / 1,421.20-2,121.65-1,202.44

Finding the Fourth Proportional to 1,421.20, 2,121.65 and 1,202.44

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Solution

The fourth proportional to 1,421.20, 2,121.65 and 1,202.44 is: 1,795.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.20 : 2,121.65 = 1,202.44 : x
  2. Step 2: Convert to fraction form
    1,421.20/2,121.65 = 1,202.44/x
  3. Step 3: Cross multiply
    1,421.20x = 2,121.65 × 1,202.44
  4. Step 4: Simplify right side
    1,421.20x = 2,551,156.83
  5. Step 5: Solve for x
    x = 2,551,156.83/1,421.20
  6. Step 6: Final answer
    x = 1,795.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.