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Finding the Fourth Proportional to 648,228.40, 972,342.60 and 412,615.60

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Solution

The fourth proportional to 648,228.40, 972,342.60 and 412,615.60 is: 618,923.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,228.40 : 972,342.60 = 412,615.60 : x
  2. Step 2: Convert to fraction form
    648,228.40/972,342.60 = 412,615.60/x
  3. Step 3: Cross multiply
    648,228.40x = 972,342.60 × 412,615.60
  4. Step 4: Simplify right side
    648,228.40x = 401,203,725,304.56
  5. Step 5: Solve for x
    x = 401,203,725,304.56/648,228.40
  6. Step 6: Final answer
    x = 618,923.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.