Home / 1,638.72-2,261.38-892.66

Finding the Fourth Proportional to 1,638.72, 2,261.38 and 892.66

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Solution

The fourth proportional to 1,638.72, 2,261.38 and 892.66 is: 1,231.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.72 : 2,261.38 = 892.66 : x
  2. Step 2: Convert to fraction form
    1,638.72/2,261.38 = 892.66/x
  3. Step 3: Cross multiply
    1,638.72x = 2,261.38 × 892.66
  4. Step 4: Simplify right side
    1,638.72x = 2,018,643.47
  5. Step 5: Solve for x
    x = 2,018,643.47/1,638.72
  6. Step 6: Final answer
    x = 1,231.84

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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.