Home / 648,120.80-972,181.20-408,972.35

Finding the Fourth Proportional to 648,120.80, 972,181.20 and 408,972.35

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Solution

The fourth proportional to 648,120.80, 972,181.20 and 408,972.35 is: 613,458.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,120.80 : 972,181.20 = 408,972.35 : x
  2. Step 2: Convert to fraction form
    648,120.80/972,181.20 = 408,972.35/x
  3. Step 3: Cross multiply
    648,120.80x = 972,181.20 × 408,972.35
  4. Step 4: Simplify right side
    648,120.80x = 397,595,229,989.82
  5. Step 5: Solve for x
    x = 397,595,229,989.82/648,120.80
  6. Step 6: Final answer
    x = 613,458.53

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Double scale
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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.