Home / 1,665.17-2,297.90-919.13

Finding the Fourth Proportional to 1,665.17, 2,297.90 and 919.13

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Solution

The fourth proportional to 1,665.17, 2,297.90 and 919.13 is: 1,268.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.17 : 2,297.90 = 919.13 : x
  2. Step 2: Convert to fraction form
    1,665.17/2,297.90 = 919.13/x
  3. Step 3: Cross multiply
    1,665.17x = 2,297.90 × 919.13
  4. Step 4: Simplify right side
    1,665.17x = 2,112,059.64
  5. Step 5: Solve for x
    x = 2,112,059.64/1,665.17
  6. Step 6: Final answer
    x = 1,268.38

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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.