Home / 2,157.84-2,977.98-1,213.74

Finding the Fourth Proportional to 2,157.84, 2,977.98 and 1,213.74

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Solution

The fourth proportional to 2,157.84, 2,977.98 and 1,213.74 is: 1,675.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.84 : 2,977.98 = 1,213.74 : x
  2. Step 2: Convert to fraction form
    2,157.84/2,977.98 = 1,213.74/x
  3. Step 3: Cross multiply
    2,157.84x = 2,977.98 × 1,213.74
  4. Step 4: Simplify right side
    2,157.84x = 3,614,493.45
  5. Step 5: Solve for x
    x = 3,614,493.45/2,157.84
  6. Step 6: Final answer
    x = 1,675.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.