Home / 4,211.45-6,315.78-1,989.93

Finding the Fourth Proportional to 4,211.45, 6,315.78 and 1,989.93

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Solution

The fourth proportional to 4,211.45, 6,315.78 and 1,989.93 is: 2,984.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,211.45 : 6,315.78 = 1,989.93 : x
  2. Step 2: Convert to fraction form
    4,211.45/6,315.78 = 1,989.93/x
  3. Step 3: Cross multiply
    4,211.45x = 6,315.78 × 1,989.93
  4. Step 4: Simplify right side
    4,211.45x = 12,567,960.10
  5. Step 5: Solve for x
    x = 12,567,960.10/4,211.45
  6. Step 6: Final answer
    x = 2,984.24

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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.