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Finding the Fourth Proportional to 428,676.60, 642,883.56 and 296,406.84

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Solution

The fourth proportional to 428,676.60, 642,883.56 and 296,406.84 is: 444,519.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,676.60 : 642,883.56 = 296,406.84 : x
  2. Step 2: Convert to fraction form
    428,676.60/642,883.56 = 296,406.84/x
  3. Step 3: Cross multiply
    428,676.60x = 642,883.56 × 296,406.84
  4. Step 4: Simplify right side
    428,676.60x = 190,555,084,507.55
  5. Step 5: Solve for x
    x = 190,555,084,507.55/428,676.60
  6. Step 6: Final answer
    x = 444,519.45

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1.5x scale

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.