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Finding the Fourth Proportional to 382,860.06, 528,463.08 and 221,754.66

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Solution

The fourth proportional to 382,860.06, 528,463.08 and 221,754.66 is: 306,088.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,860.06 : 528,463.08 = 221,754.66 : x
  2. Step 2: Convert to fraction form
    382,860.06/528,463.08 = 221,754.66/x
  3. Step 3: Cross multiply
    382,860.06x = 528,463.08 × 221,754.66
  4. Step 4: Simplify right side
    382,860.06x = 117,189,150,627.95
  5. Step 5: Solve for x
    x = 117,189,150,627.95/382,860.06
  6. Step 6: Final answer
    x = 306,088.73

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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.