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Finding the Fourth Proportional to 3,698.96, 5,548.76 and 1,390.64

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Solution

The fourth proportional to 3,698.96, 5,548.76 and 1,390.64 is: 2,086.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,698.96 : 5,548.76 = 1,390.64 : x
  2. Step 2: Convert to fraction form
    3,698.96/5,548.76 = 1,390.64/x
  3. Step 3: Cross multiply
    3,698.96x = 5,548.76 × 1,390.64
  4. Step 4: Simplify right side
    3,698.96x = 7,716,327.61
  5. Step 5: Solve for x
    x = 7,716,327.61/3,698.96
  6. Step 6: Final answer
    x = 2,086.08

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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.