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Finding the Fourth Proportional to 5,638.40, 8,450.40 and 4,333.40

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Solution

The fourth proportional to 5,638.40, 8,450.40 and 4,333.40 is: 6,494.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.40 : 8,450.40 = 4,333.40 : x
  2. Step 2: Convert to fraction form
    5,638.40/8,450.40 = 4,333.40/x
  3. Step 3: Cross multiply
    5,638.40x = 8,450.40 × 4,333.40
  4. Step 4: Simplify right side
    5,638.40x = 36,618,963.36
  5. Step 5: Solve for x
    x = 36,618,963.36/5,638.40
  6. Step 6: Final answer
    x = 6,494.57

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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.