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Finding the Fourth Proportional to 695,081.61, 958,989.56 and 389,112.93

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Solution

The fourth proportional to 695,081.61, 958,989.56 and 389,112.93 is: 536,850.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,081.61 : 958,989.56 = 389,112.93 : x
  2. Step 2: Convert to fraction form
    695,081.61/958,989.56 = 389,112.93/x
  3. Step 3: Cross multiply
    695,081.61x = 958,989.56 × 389,112.93
  4. Step 4: Simplify right side
    695,081.61x = 373,155,230,790.50
  5. Step 5: Solve for x
    x = 373,155,230,790.50/695,081.61
  6. Step 6: Final answer
    x = 536,850.97

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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.