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Finding the Fourth Proportional to 414,555.30, 621,763.38 and 115,066.31

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Solution

The fourth proportional to 414,555.30, 621,763.38 and 115,066.31 is: 172,580.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,555.30 : 621,763.38 = 115,066.31 : x
  2. Step 2: Convert to fraction form
    414,555.30/621,763.38 = 115,066.31/x
  3. Step 3: Cross multiply
    414,555.30x = 621,763.38 × 115,066.31
  4. Step 4: Simplify right side
    414,555.30x = 71,544,017,829.73
  5. Step 5: Solve for x
    x = 71,544,017,829.73/414,555.30
  6. Step 6: Final answer
    x = 172,580.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.