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Finding the Fourth Proportional to 555,066, 765,991.08 and 300,419.28

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Solution

The fourth proportional to 555,066, 765,991.08 and 300,419.28 is: 414,578.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,066 : 765,991.08 = 300,419.28 : x
  2. Step 2: Convert to fraction form
    555,066/765,991.08 = 300,419.28/x
  3. Step 3: Cross multiply
    555,066x = 765,991.08 × 300,419.28
  4. Step 4: Simplify right side
    555,066x = 230,118,488,740.02
  5. Step 5: Solve for x
    x = 230,118,488,740.02/555,066
  6. Step 6: Final answer
    x = 414,578.61

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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.