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Finding the Fourth Proportional to 1,431,486.72, 1,975,458.06 and 786,948.42

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Solution

The fourth proportional to 1,431,486.72, 1,975,458.06 and 786,948.42 is: 1,085,992.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431,486.72 : 1,975,458.06 = 786,948.42 : x
  2. Step 2: Convert to fraction form
    1,431,486.72/1,975,458.06 = 786,948.42/x
  3. Step 3: Cross multiply
    1,431,486.72x = 1,975,458.06 × 786,948.42
  4. Step 4: Simplify right side
    1,431,486.72x = 1,554,583,599,093.27
  5. Step 5: Solve for x
    x = 1,554,583,599,093.27/1,431,486.72
  6. Step 6: Final answer
    x = 1,085,992.33

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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.