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Finding the Fourth Proportional to 388,643.39, 582,909.72 and 122,396.98

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Solution

The fourth proportional to 388,643.39, 582,909.72 and 122,396.98 is: 183,578.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,643.39 : 582,909.72 = 122,396.98 : x
  2. Step 2: Convert to fraction form
    388,643.39/582,909.72 = 122,396.98/x
  3. Step 3: Cross multiply
    388,643.39x = 582,909.72 × 122,396.98
  4. Step 4: Simplify right side
    388,643.39x = 71,346,391,189.50
  5. Step 5: Solve for x
    x = 71,346,391,189.50/388,643.39
  6. Step 6: Final answer
    x = 183,578.04

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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.