Home / 1,621.75-2,237.89-913.37

Finding the Fourth Proportional to 1,621.75, 2,237.89 and 913.37

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Solution

The fourth proportional to 1,621.75, 2,237.89 and 913.37 is: 1,260.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.75 : 2,237.89 = 913.37 : x
  2. Step 2: Convert to fraction form
    1,621.75/2,237.89 = 913.37/x
  3. Step 3: Cross multiply
    1,621.75x = 2,237.89 × 913.37
  4. Step 4: Simplify right side
    1,621.75x = 2,044,022.10
  5. Step 5: Solve for x
    x = 2,044,022.10/1,621.75
  6. Step 6: Final answer
    x = 1,260.38

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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.