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Finding the Fourth Proportional to 351,090.40, 526,635.60 and 281,106.40

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Solution

The fourth proportional to 351,090.40, 526,635.60 and 281,106.40 is: 421,659.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,090.40 : 526,635.60 = 281,106.40 : x
  2. Step 2: Convert to fraction form
    351,090.40/526,635.60 = 281,106.40/x
  3. Step 3: Cross multiply
    351,090.40x = 526,635.60 × 281,106.40
  4. Step 4: Simplify right side
    351,090.40x = 148,040,637,627.84
  5. Step 5: Solve for x
    x = 148,040,637,627.84/351,090.40
  6. Step 6: Final answer
    x = 421,659.60

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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.