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Finding the Fourth Proportional to 6,663.40, 9,992.40 and 2,278.60

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Solution

The fourth proportional to 6,663.40, 9,992.40 and 2,278.60 is: 3,416.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,663.40 : 9,992.40 = 2,278.60 : x
  2. Step 2: Convert to fraction form
    6,663.40/9,992.40 = 2,278.60/x
  3. Step 3: Cross multiply
    6,663.40x = 9,992.40 × 2,278.60
  4. Step 4: Simplify right side
    6,663.40x = 22,768,682.64
  5. Step 5: Solve for x
    x = 22,768,682.64/6,663.40
  6. Step 6: Final answer
    x = 3,416.98

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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.