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Finding the Fourth Proportional to 666,937.14, 920,370.78 and 380,456.70

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Solution

The fourth proportional to 666,937.14, 920,370.78 and 380,456.70 is: 525,028.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,937.14 : 920,370.78 = 380,456.70 : x
  2. Step 2: Convert to fraction form
    666,937.14/920,370.78 = 380,456.70/x
  3. Step 3: Cross multiply
    666,937.14x = 920,370.78 × 380,456.70
  4. Step 4: Simplify right side
    666,937.14x = 350,161,229,735.23
  5. Step 5: Solve for x
    x = 350,161,229,735.23/666,937.14
  6. Step 6: Final answer
    x = 525,028.84

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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.