Home / 1,985.62-2,740.20-1,101.34

Finding the Fourth Proportional to 1,985.62, 2,740.20 and 1,101.34

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Solution

The fourth proportional to 1,985.62, 2,740.20 and 1,101.34 is: 1,519.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.62 : 2,740.20 = 1,101.34 : x
  2. Step 2: Convert to fraction form
    1,985.62/2,740.20 = 1,101.34/x
  3. Step 3: Cross multiply
    1,985.62x = 2,740.20 × 1,101.34
  4. Step 4: Simplify right side
    1,985.62x = 3,017,891.87
  5. Step 5: Solve for x
    x = 3,017,891.87/1,985.62
  6. Step 6: Final answer
    x = 1,519.87

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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.