Home / 1,638.46-2,261.28-1,048.78

Finding the Fourth Proportional to 1,638.46, 2,261.28 and 1,048.78

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Solution

The fourth proportional to 1,638.46, 2,261.28 and 1,048.78 is: 1,447.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.46 : 2,261.28 = 1,048.78 : x
  2. Step 2: Convert to fraction form
    1,638.46/2,261.28 = 1,048.78/x
  3. Step 3: Cross multiply
    1,638.46x = 2,261.28 × 1,048.78
  4. Step 4: Simplify right side
    1,638.46x = 2,371,585.24
  5. Step 5: Solve for x
    x = 2,371,585.24/1,638.46
  6. Step 6: Final answer
    x = 1,447.45

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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.