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Finding the Fourth Proportional to 5,639.40, 8,459.40 and 2,867.40

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Solution

The fourth proportional to 5,639.40, 8,459.40 and 2,867.40 is: 4,301.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.40 : 8,459.40 = 2,867.40 : x
  2. Step 2: Convert to fraction form
    5,639.40/8,459.40 = 2,867.40/x
  3. Step 3: Cross multiply
    5,639.40x = 8,459.40 × 2,867.40
  4. Step 4: Simplify right side
    5,639.40x = 24,256,483.56
  5. Step 5: Solve for x
    x = 24,256,483.56/5,639.40
  6. Step 6: Final answer
    x = 4,301.25

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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.