Home / 1,921.50-2,874.51-1,664.31

Finding the Fourth Proportional to 1,921.50, 2,874.51 and 1,664.31

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Solution

The fourth proportional to 1,921.50, 2,874.51 and 1,664.31 is: 2,489.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.50 : 2,874.51 = 1,664.31 : x
  2. Step 2: Convert to fraction form
    1,921.50/2,874.51 = 1,664.31/x
  3. Step 3: Cross multiply
    1,921.50x = 2,874.51 × 1,664.31
  4. Step 4: Simplify right side
    1,921.50x = 4,784,075.74
  5. Step 5: Solve for x
    x = 4,784,075.74/1,921.50
  6. Step 6: Final answer
    x = 2,489.76

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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.