Home / 1,638.45-2,261.05-1,008.95

Finding the Fourth Proportional to 1,638.45, 2,261.05 and 1,008.95

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Solution

The fourth proportional to 1,638.45, 2,261.05 and 1,008.95 is: 1,392.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.45 : 2,261.05 = 1,008.95 : x
  2. Step 2: Convert to fraction form
    1,638.45/2,261.05 = 1,008.95/x
  3. Step 3: Cross multiply
    1,638.45x = 2,261.05 × 1,008.95
  4. Step 4: Simplify right side
    1,638.45x = 2,281,272.57
  5. Step 5: Solve for x
    x = 2,281,272.57/1,638.45
  6. Step 6: Final answer
    x = 1,392.34

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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.