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Finding the Fourth Proportional to 315,331.78, 472,716.36 and 115,605.54

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Solution

The fourth proportional to 315,331.78, 472,716.36 and 115,605.54 is: 173,305.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,331.78 : 472,716.36 = 115,605.54 : x
  2. Step 2: Convert to fraction form
    315,331.78/472,716.36 = 115,605.54/x
  3. Step 3: Cross multiply
    315,331.78x = 472,716.36 × 115,605.54
  4. Step 4: Simplify right side
    315,331.78x = 54,648,630,064.63
  5. Step 5: Solve for x
    x = 54,648,630,064.63/315,331.78
  6. Step 6: Final answer
    x = 173,305.18

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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.