Home / 1,385.46-2,074.19-1,288.15

Finding the Fourth Proportional to 1,385.46, 2,074.19 and 1,288.15

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Solution

The fourth proportional to 1,385.46, 2,074.19 and 1,288.15 is: 1,928.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.46 : 2,074.19 = 1,288.15 : x
  2. Step 2: Convert to fraction form
    1,385.46/2,074.19 = 1,288.15/x
  3. Step 3: Cross multiply
    1,385.46x = 2,074.19 × 1,288.15
  4. Step 4: Simplify right side
    1,385.46x = 2,671,865.88
  5. Step 5: Solve for x
    x = 2,671,865.88/1,385.46
  6. Step 6: Final answer
    x = 1,928.50

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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.