Home / 2,146.21-3,218.94-645.20

Finding the Fourth Proportional to 2,146.21, 3,218.94 and 645.20

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Solution

The fourth proportional to 2,146.21, 3,218.94 and 645.20 is: 967.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,146.21 : 3,218.94 = 645.20 : x
  2. Step 2: Convert to fraction form
    2,146.21/3,218.94 = 645.20/x
  3. Step 3: Cross multiply
    2,146.21x = 3,218.94 × 645.20
  4. Step 4: Simplify right side
    2,146.21x = 2,076,877.80
  5. Step 5: Solve for x
    x = 2,076,877.80/2,146.21
  6. Step 6: Final answer
    x = 967.70

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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.