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Finding the Fourth Proportional to 685,046.40, 945,349 and 374,947.44

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Solution

The fourth proportional to 685,046.40, 945,349 and 374,947.44 is: 517,419.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,046.40 : 945,349 = 374,947.44 : x
  2. Step 2: Convert to fraction form
    685,046.40/945,349 = 374,947.44/x
  3. Step 3: Cross multiply
    685,046.40x = 945,349 × 374,947.44
  4. Step 4: Simplify right side
    685,046.40x = 354,456,187,456.56
  5. Step 5: Solve for x
    x = 354,456,187,456.56/685,046.40
  6. Step 6: Final answer
    x = 517,419.24

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1.5x scale

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.