Home / 3,878.51-5,818.67-1,281.45

Finding the Fourth Proportional to 3,878.51, 5,818.67 and 1,281.45

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Solution

The fourth proportional to 3,878.51, 5,818.67 and 1,281.45 is: 1,922.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.51 : 5,818.67 = 1,281.45 : x
  2. Step 2: Convert to fraction form
    3,878.51/5,818.67 = 1,281.45/x
  3. Step 3: Cross multiply
    3,878.51x = 5,818.67 × 1,281.45
  4. Step 4: Simplify right side
    3,878.51x = 7,456,311.20
  5. Step 5: Solve for x
    x = 7,456,311.20/3,878.51
  6. Step 6: Final answer
    x = 1,922.47

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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.