Home / 3,878.42-5,818.95-1,688.59

Finding the Fourth Proportional to 3,878.42, 5,818.95 and 1,688.59

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Solution

The fourth proportional to 3,878.42, 5,818.95 and 1,688.59 is: 2,533.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.42 : 5,818.95 = 1,688.59 : x
  2. Step 2: Convert to fraction form
    3,878.42/5,818.95 = 1,688.59/x
  3. Step 3: Cross multiply
    3,878.42x = 5,818.95 × 1,688.59
  4. Step 4: Simplify right side
    3,878.42x = 9,825,806.23
  5. Step 5: Solve for x
    x = 9,825,806.23/3,878.42
  6. Step 6: Final answer
    x = 2,533.45

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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.