Home / 2,976.40-4,106.70-1,781.77

Finding the Fourth Proportional to 2,976.40, 4,106.70 and 1,781.77

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Solution

The fourth proportional to 2,976.40, 4,106.70 and 1,781.77 is: 2,458.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,976.40 : 4,106.70 = 1,781.77 : x
  2. Step 2: Convert to fraction form
    2,976.40/4,106.70 = 1,781.77/x
  3. Step 3: Cross multiply
    2,976.40x = 4,106.70 × 1,781.77
  4. Step 4: Simplify right side
    2,976.40x = 7,317,194.86
  5. Step 5: Solve for x
    x = 7,317,194.86/2,976.40
  6. Step 6: Final answer
    x = 2,458.40

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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.