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Finding the Fourth Proportional to 401,492.21, 554,074.74 and 220,211.78

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Solution

The fourth proportional to 401,492.21, 554,074.74 and 220,211.78 is: 303,900.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,492.21 : 554,074.74 = 220,211.78 : x
  2. Step 2: Convert to fraction form
    401,492.21/554,074.74 = 220,211.78/x
  3. Step 3: Cross multiply
    401,492.21x = 554,074.74 × 220,211.78
  4. Step 4: Simplify right side
    401,492.21x = 122,013,781,978.06
  5. Step 5: Solve for x
    x = 122,013,781,978.06/401,492.21
  6. Step 6: Final answer
    x = 303,900.75

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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.