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Finding the Fourth Proportional to 627,782.40, 941,673.60 and 388,087.20

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Solution

The fourth proportional to 627,782.40, 941,673.60 and 388,087.20 is: 582,130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,782.40 : 941,673.60 = 388,087.20 : x
  2. Step 2: Convert to fraction form
    627,782.40/941,673.60 = 388,087.20/x
  3. Step 3: Cross multiply
    627,782.40x = 941,673.60 × 388,087.20
  4. Step 4: Simplify right side
    627,782.40x = 365,451,470,737.92
  5. Step 5: Solve for x
    x = 365,451,470,737.92/627,782.40
  6. Step 6: Final answer
    x = 582,130.80

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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.