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Finding the Fourth Proportional to 666,944.08, 920,470.48 and 380,398.48

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Solution

The fourth proportional to 666,944.08, 920,470.48 and 380,398.48 is: 524,999.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,944.08 : 920,470.48 = 380,398.48 : x
  2. Step 2: Convert to fraction form
    666,944.08/920,470.48 = 380,398.48/x
  3. Step 3: Cross multiply
    666,944.08x = 920,470.48 × 380,398.48
  4. Step 4: Simplify right side
    666,944.08x = 350,145,571,476.87
  5. Step 5: Solve for x
    x = 350,145,571,476.87/666,944.08
  6. Step 6: Final answer
    x = 524,999.89

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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.