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Finding the Fourth Proportional to 2,878.32, 3,971.48 and 1,698.71

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Solution

The fourth proportional to 2,878.32, 3,971.48 and 1,698.71 is: 2,343.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.32 : 3,971.48 = 1,698.71 : x
  2. Step 2: Convert to fraction form
    2,878.32/3,971.48 = 1,698.71/x
  3. Step 3: Cross multiply
    2,878.32x = 3,971.48 × 1,698.71
  4. Step 4: Simplify right side
    2,878.32x = 6,746,364.44
  5. Step 5: Solve for x
    x = 6,746,364.44/2,878.32
  6. Step 6: Final answer
    x = 2,343.85

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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.