Home / 2,628.95-3,944.21-780.12

Finding the Fourth Proportional to 2,628.95, 3,944.21 and 780.12

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Solution

The fourth proportional to 2,628.95, 3,944.21 and 780.12 is: 1,170.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.95 : 3,944.21 = 780.12 : x
  2. Step 2: Convert to fraction form
    2,628.95/3,944.21 = 780.12/x
  3. Step 3: Cross multiply
    2,628.95x = 3,944.21 × 780.12
  4. Step 4: Simplify right side
    2,628.95x = 3,076,953.20
  5. Step 5: Solve for x
    x = 3,076,953.20/2,628.95
  6. Step 6: Final answer
    x = 1,170.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.