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Finding the Fourth Proportional to 1,489,904.64, 2,056,004.64 and 810,839.52

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Solution

The fourth proportional to 1,489,904.64, 2,056,004.64 and 810,839.52 is: 1,118,923.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489,904.64 : 2,056,004.64 = 810,839.52 : x
  2. Step 2: Convert to fraction form
    1,489,904.64/2,056,004.64 = 810,839.52/x
  3. Step 3: Cross multiply
    1,489,904.64x = 2,056,004.64 × 810,839.52
  4. Step 4: Simplify right side
    1,489,904.64x = 1,667,089,815,415.37
  5. Step 5: Solve for x
    x = 1,667,089,815,415.37/1,489,904.64
  6. Step 6: Final answer
    x = 1,118,923.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.