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Finding the Fourth Proportional to 648,002.40, 972,003.60 and 412,389.60

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Solution

The fourth proportional to 648,002.40, 972,003.60 and 412,389.60 is: 618,584.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,002.40 : 972,003.60 = 412,389.60 : x
  2. Step 2: Convert to fraction form
    648,002.40/972,003.60 = 412,389.60/x
  3. Step 3: Cross multiply
    648,002.40x = 972,003.60 × 412,389.60
  4. Step 4: Simplify right side
    648,002.40x = 400,844,175,802.56
  5. Step 5: Solve for x
    x = 400,844,175,802.56/648,002.40
  6. Step 6: Final answer
    x = 618,584.40

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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.