Home / 1,621.36-2,237.49-922.78

Finding the Fourth Proportional to 1,621.36, 2,237.49 and 922.78

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Solution

The fourth proportional to 1,621.36, 2,237.49 and 922.78 is: 1,273.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.36 : 2,237.49 = 922.78 : x
  2. Step 2: Convert to fraction form
    1,621.36/2,237.49 = 922.78/x
  3. Step 3: Cross multiply
    1,621.36x = 2,237.49 × 922.78
  4. Step 4: Simplify right side
    1,621.36x = 2,064,711.02
  5. Step 5: Solve for x
    x = 2,064,711.02/1,621.36
  6. Step 6: Final answer
    x = 1,273.44

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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.