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Finding the Fourth Proportional to 667,035.96, 920,515.50 and 395,119.32

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Solution

The fourth proportional to 667,035.96, 920,515.50 and 395,119.32 is: 545,268.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,035.96 : 920,515.50 = 395,119.32 : x
  2. Step 2: Convert to fraction form
    667,035.96/920,515.50 = 395,119.32/x
  3. Step 3: Cross multiply
    667,035.96x = 920,515.50 × 395,119.32
  4. Step 4: Simplify right side
    667,035.96x = 363,713,458,409.46
  5. Step 5: Solve for x
    x = 363,713,458,409.46/667,035.96
  6. Step 6: Final answer
    x = 545,268.14

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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.