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Finding the Fourth Proportional to 1,397,939.23, 1,928,046.59 and 907,372.45

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Solution

The fourth proportional to 1,397,939.23, 1,928,046.59 and 907,372.45 is: 1,251,453.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397,939.23 : 1,928,046.59 = 907,372.45 : x
  2. Step 2: Convert to fraction form
    1,397,939.23/1,928,046.59 = 907,372.45/x
  3. Step 3: Cross multiply
    1,397,939.23x = 1,928,046.59 × 907,372.45
  4. Step 4: Simplify right side
    1,397,939.23x = 1,749,456,358,082.45
  5. Step 5: Solve for x
    x = 1,749,456,358,082.45/1,397,939.23
  6. Step 6: Final answer
    x = 1,251,453.80

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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.