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Finding the Fourth Proportional to 685,228.40, 945,617.34 and 370,900.16

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Solution

The fourth proportional to 685,228.40, 945,617.34 and 370,900.16 is: 511,843.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,228.40 : 945,617.34 = 370,900.16 : x
  2. Step 2: Convert to fraction form
    685,228.40/945,617.34 = 370,900.16/x
  3. Step 3: Cross multiply
    685,228.40x = 945,617.34 × 370,900.16
  4. Step 4: Simplify right side
    685,228.40x = 350,729,617,976.69
  5. Step 5: Solve for x
    x = 350,729,617,976.69/685,228.40
  6. Step 6: Final answer
    x = 511,843.38

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Double scale
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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.