Home / 1,621.62-2,235.60-1,223.10

Finding the Fourth Proportional to 1,621.62, 2,235.60 and 1,223.10

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Solution

The fourth proportional to 1,621.62, 2,235.60 and 1,223.10 is: 1,686.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.62 : 2,235.60 = 1,223.10 : x
  2. Step 2: Convert to fraction form
    1,621.62/2,235.60 = 1,223.10/x
  3. Step 3: Cross multiply
    1,621.62x = 2,235.60 × 1,223.10
  4. Step 4: Simplify right side
    1,621.62x = 2,734,362.36
  5. Step 5: Solve for x
    x = 2,734,362.36/1,621.62
  6. Step 6: Final answer
    x = 1,686.19

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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.