Home / 1,549.16-2,137.15-919.72

Finding the Fourth Proportional to 1,549.16, 2,137.15 and 919.72

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Solution

The fourth proportional to 1,549.16, 2,137.15 and 919.72 is: 1,268.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.16 : 2,137.15 = 919.72 : x
  2. Step 2: Convert to fraction form
    1,549.16/2,137.15 = 919.72/x
  3. Step 3: Cross multiply
    1,549.16x = 2,137.15 × 919.72
  4. Step 4: Simplify right side
    1,549.16x = 1,965,579.60
  5. Step 5: Solve for x
    x = 1,965,579.60/1,549.16
  6. Step 6: Final answer
    x = 1,268.80

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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.