Home / 1,549.44-2,138.40-919.84

Finding the Fourth Proportional to 1,549.44, 2,138.40 and 919.84

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Solution

The fourth proportional to 1,549.44, 2,138.40 and 919.84 is: 1,269.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.44 : 2,138.40 = 919.84 : x
  2. Step 2: Convert to fraction form
    1,549.44/2,138.40 = 919.84/x
  3. Step 3: Cross multiply
    1,549.44x = 2,138.40 × 919.84
  4. Step 4: Simplify right side
    1,549.44x = 1,966,985.86
  5. Step 5: Solve for x
    x = 1,966,985.86/1,549.44
  6. Step 6: Final answer
    x = 1,269.48

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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.