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Finding the Fourth Proportional to 1,384,813, 1,911,047.70 and 748,909

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Solution

The fourth proportional to 1,384,813, 1,911,047.70 and 748,909 is: 1,033,497.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384,813 : 1,911,047.70 = 748,909 : x
  2. Step 2: Convert to fraction form
    1,384,813/1,911,047.70 = 748,909/x
  3. Step 3: Cross multiply
    1,384,813x = 1,911,047.70 × 748,909
  4. Step 4: Simplify right side
    1,384,813x = 1,431,200,821,959.30
  5. Step 5: Solve for x
    x = 1,431,200,821,959.30/1,384,813
  6. Step 6: Final answer
    x = 1,033,497.54

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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.