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Finding the Fourth Proportional to 431,072.48, 646,608.72 and 131,554.59

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Solution

The fourth proportional to 431,072.48, 646,608.72 and 131,554.59 is: 197,331.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,072.48 : 646,608.72 = 131,554.59 : x
  2. Step 2: Convert to fraction form
    431,072.48/646,608.72 = 131,554.59/x
  3. Step 3: Cross multiply
    431,072.48x = 646,608.72 × 131,554.59
  4. Step 4: Simplify right side
    431,072.48x = 85,064,345,050.02
  5. Step 5: Solve for x
    x = 85,064,345,050.02/431,072.48
  6. Step 6: Final answer
    x = 197,331.89

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Similar ratio
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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.