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Finding the Fourth Proportional to 6,391.88, 9,590.70 and 4,201.64

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Solution

The fourth proportional to 6,391.88, 9,590.70 and 4,201.64 is: 6,304.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.88 : 9,590.70 = 4,201.64 : x
  2. Step 2: Convert to fraction form
    6,391.88/9,590.70 = 4,201.64/x
  3. Step 3: Cross multiply
    6,391.88x = 9,590.70 × 4,201.64
  4. Step 4: Simplify right side
    6,391.88x = 40,296,668.75
  5. Step 5: Solve for x
    x = 40,296,668.75/6,391.88
  6. Step 6: Final answer
    x = 6,304.35

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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.