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Finding the Fourth Proportional to 4,459.40, 6,690.70 and 4,299.40

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Solution

The fourth proportional to 4,459.40, 6,690.70 and 4,299.40 is: 6,450.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,459.40 : 6,690.70 = 4,299.40 : x
  2. Step 2: Convert to fraction form
    4,459.40/6,690.70 = 4,299.40/x
  3. Step 3: Cross multiply
    4,459.40x = 6,690.70 × 4,299.40
  4. Step 4: Simplify right side
    4,459.40x = 28,765,995.58
  5. Step 5: Solve for x
    x = 28,765,995.58/4,459.40
  6. Step 6: Final answer
    x = 6,450.64

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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.