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Finding the Fourth Proportional to 666,940.08, 920,464.96 and 380,394.48

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Solution

The fourth proportional to 666,940.08, 920,464.96 and 380,394.48 is: 524,994.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,940.08 : 920,464.96 = 380,394.48 : x
  2. Step 2: Convert to fraction form
    666,940.08/920,464.96 = 380,394.48/x
  3. Step 3: Cross multiply
    666,940.08x = 920,464.96 × 380,394.48
  4. Step 4: Simplify right side
    666,940.08x = 350,139,789,817.42
  5. Step 5: Solve for x
    x = 350,139,789,817.42/666,940.08
  6. Step 6: Final answer
    x = 524,994.37

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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.