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Finding the Fourth Proportional to 719,619.12, 993,078 and 397,329.84

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Solution

The fourth proportional to 719,619.12, 993,078 and 397,329.84 is: 548,317.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,619.12 : 993,078 = 397,329.84 : x
  2. Step 2: Convert to fraction form
    719,619.12/993,078 = 397,329.84/x
  3. Step 3: Cross multiply
    719,619.12x = 993,078 × 397,329.84
  4. Step 4: Simplify right side
    719,619.12x = 394,579,522,847.52
  5. Step 5: Solve for x
    x = 394,579,522,847.52/719,619.12
  6. Step 6: Final answer
    x = 548,317.17

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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.