Home / 2,975.40-4,105.32-1,780.77

Finding the Fourth Proportional to 2,975.40, 4,105.32 and 1,780.77

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Solution

The fourth proportional to 2,975.40, 4,105.32 and 1,780.77 is: 2,457.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,975.40 : 4,105.32 = 1,780.77 : x
  2. Step 2: Convert to fraction form
    2,975.40/4,105.32 = 1,780.77/x
  3. Step 3: Cross multiply
    2,975.40x = 4,105.32 × 1,780.77
  4. Step 4: Simplify right side
    2,975.40x = 7,310,630.70
  5. Step 5: Solve for x
    x = 7,310,630.70/2,975.40
  6. Step 6: Final answer
    x = 2,457.02

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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.