Home / 1,644.22-2,269.38-981.20

Finding the Fourth Proportional to 1,644.22, 2,269.38 and 981.20

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Solution

The fourth proportional to 1,644.22, 2,269.38 and 981.20 is: 1,354.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644.22 : 2,269.38 = 981.20 : x
  2. Step 2: Convert to fraction form
    1,644.22/2,269.38 = 981.20/x
  3. Step 3: Cross multiply
    1,644.22x = 2,269.38 × 981.20
  4. Step 4: Simplify right side
    1,644.22x = 2,226,715.66
  5. Step 5: Solve for x
    x = 2,226,715.66/1,644.22
  6. Step 6: Final answer
    x = 1,354.27

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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.