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Finding the Fourth Proportional to 555,027.18, 765,939.81 and 300,378.34

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Solution

The fourth proportional to 555,027.18, 765,939.81 and 300,378.34 is: 414,523.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,027.18 : 765,939.81 = 300,378.34 : x
  2. Step 2: Convert to fraction form
    555,027.18/765,939.81 = 300,378.34/x
  3. Step 3: Cross multiply
    555,027.18x = 765,939.81 × 300,378.34
  4. Step 4: Simplify right side
    555,027.18x = 230,071,728,667.72
  5. Step 5: Solve for x
    x = 230,071,728,667.72/555,027.18
  6. Step 6: Final answer
    x = 414,523.35

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1.5x scale

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.