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Finding the Fourth Proportional to 1,431,487.72, 1,975,459.44 and 786,949.42

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Solution

The fourth proportional to 1,431,487.72, 1,975,459.44 and 786,949.42 is: 1,085,993.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431,487.72 : 1,975,459.44 = 786,949.42 : x
  2. Step 2: Convert to fraction form
    1,431,487.72/1,975,459.44 = 786,949.42/x
  3. Step 3: Cross multiply
    1,431,487.72x = 1,975,459.44 × 786,949.42
  4. Step 4: Simplify right side
    1,431,487.72x = 1,554,586,660,541.53
  5. Step 5: Solve for x
    x = 1,554,586,660,541.53/1,431,487.72
  6. Step 6: Final answer
    x = 1,085,993.71

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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.