Home / 1,770.40-2,443.44-1,072.12

Finding the Fourth Proportional to 1,770.40, 2,443.44 and 1,072.12

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Solution

The fourth proportional to 1,770.40, 2,443.44 and 1,072.12 is: 1,479.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,770.40 : 2,443.44 = 1,072.12 : x
  2. Step 2: Convert to fraction form
    1,770.40/2,443.44 = 1,072.12/x
  3. Step 3: Cross multiply
    1,770.40x = 2,443.44 × 1,072.12
  4. Step 4: Simplify right side
    1,770.40x = 2,619,660.89
  5. Step 5: Solve for x
    x = 2,619,660.89/1,770.40
  6. Step 6: Final answer
    x = 1,479.70

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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.