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Finding the Fourth Proportional to 665,693.82, 918,657.59 and 359,769.20

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Solution

The fourth proportional to 665,693.82, 918,657.59 and 359,769.20 is: 496,481.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,693.82 : 918,657.59 = 359,769.20 : x
  2. Step 2: Convert to fraction form
    665,693.82/918,657.59 = 359,769.20/x
  3. Step 3: Cross multiply
    665,693.82x = 918,657.59 × 359,769.20
  4. Step 4: Simplify right side
    665,693.82x = 330,504,699,836.09
  5. Step 5: Solve for x
    x = 330,504,699,836.09/665,693.82
  6. Step 6: Final answer
    x = 496,481.55

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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.