Home / 3,205.18-4,421.91-1,878.40

Finding the Fourth Proportional to 3,205.18, 4,421.91 and 1,878.40

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Solution

The fourth proportional to 3,205.18, 4,421.91 and 1,878.40 is: 2,591.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,205.18 : 4,421.91 = 1,878.40 : x
  2. Step 2: Convert to fraction form
    3,205.18/4,421.91 = 1,878.40/x
  3. Step 3: Cross multiply
    3,205.18x = 4,421.91 × 1,878.40
  4. Step 4: Simplify right side
    3,205.18x = 8,306,104.69
  5. Step 5: Solve for x
    x = 8,306,104.69/3,205.18
  6. Step 6: Final answer
    x = 2,591.46

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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.