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Finding the Fourth Proportional to 395,987.96, 594,041.21 and 143,327.57

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Solution

The fourth proportional to 395,987.96, 594,041.21 and 143,327.57 is: 215,012.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,987.96 : 594,041.21 = 143,327.57 : x
  2. Step 2: Convert to fraction form
    395,987.96/594,041.21 = 143,327.57/x
  3. Step 3: Cross multiply
    395,987.96x = 594,041.21 × 143,327.57
  4. Step 4: Simplify right side
    395,987.96x = 85,142,483,109.16
  5. Step 5: Solve for x
    x = 85,142,483,109.16/395,987.96
  6. Step 6: Final answer
    x = 215,012.81

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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.