Home / 2,381.02-3,570.99-919.78

Finding the Fourth Proportional to 2,381.02, 3,570.99 and 919.78

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Solution

The fourth proportional to 2,381.02, 3,570.99 and 919.78 is: 1,379.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.02 : 3,570.99 = 919.78 : x
  2. Step 2: Convert to fraction form
    2,381.02/3,570.99 = 919.78/x
  3. Step 3: Cross multiply
    2,381.02x = 3,570.99 × 919.78
  4. Step 4: Simplify right side
    2,381.02x = 3,284,525.18
  5. Step 5: Solve for x
    x = 3,284,525.18/2,381.02
  6. Step 6: Final answer
    x = 1,379.46

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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.