Home / 1,436.84-2,157.08-1,221.78

Finding the Fourth Proportional to 1,436.84, 2,157.08 and 1,221.78

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Solution

The fourth proportional to 1,436.84, 2,157.08 and 1,221.78 is: 1,834.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,436.84 : 2,157.08 = 1,221.78 : x
  2. Step 2: Convert to fraction form
    1,436.84/2,157.08 = 1,221.78/x
  3. Step 3: Cross multiply
    1,436.84x = 2,157.08 × 1,221.78
  4. Step 4: Simplify right side
    1,436.84x = 2,635,486.06
  5. Step 5: Solve for x
    x = 2,635,486.06/1,436.84
  6. Step 6: Final answer
    x = 1,834.23

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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.