Home / 1,454.20-2,181.58-621.25

Finding the Fourth Proportional to 1,454.20, 2,181.58 and 621.25

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Solution

The fourth proportional to 1,454.20, 2,181.58 and 621.25 is: 931.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,454.20 : 2,181.58 = 621.25 : x
  2. Step 2: Convert to fraction form
    1,454.20/2,181.58 = 621.25/x
  3. Step 3: Cross multiply
    1,454.20x = 2,181.58 × 621.25
  4. Step 4: Simplify right side
    1,454.20x = 1,355,292.56
  5. Step 5: Solve for x
    x = 1,355,292.56/1,454.20
  6. Step 6: Final answer
    x = 931.99

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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.