Home / 4,280.43-6,421.59-1,318.89

Finding the Fourth Proportional to 4,280.43, 6,421.59 and 1,318.89

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Solution

The fourth proportional to 4,280.43, 6,421.59 and 1,318.89 is: 1,978.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,280.43 : 6,421.59 = 1,318.89 : x
  2. Step 2: Convert to fraction form
    4,280.43/6,421.59 = 1,318.89/x
  3. Step 3: Cross multiply
    4,280.43x = 6,421.59 × 1,318.89
  4. Step 4: Simplify right side
    4,280.43x = 8,469,370.84
  5. Step 5: Solve for x
    x = 8,469,370.84/4,280.43
  6. Step 6: Final answer
    x = 1,978.63

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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.