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Finding the Fourth Proportional to 382,692.37, 528,180.18 and 221,645.32

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Solution

The fourth proportional to 382,692.37, 528,180.18 and 221,645.32 is: 305,908.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,692.37 : 528,180.18 = 221,645.32 : x
  2. Step 2: Convert to fraction form
    382,692.37/528,180.18 = 221,645.32/x
  3. Step 3: Cross multiply
    382,692.37x = 528,180.18 × 221,645.32
  4. Step 4: Simplify right side
    382,692.37x = 117,068,665,013.76
  5. Step 5: Solve for x
    x = 117,068,665,013.76/382,692.37
  6. Step 6: Final answer
    x = 305,908.02

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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.