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Finding the Fourth Proportional to 428,673.10, 642,878.31 and 296,403.34

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Solution

The fourth proportional to 428,673.10, 642,878.31 and 296,403.34 is: 444,514.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,673.10 : 642,878.31 = 296,403.34 : x
  2. Step 2: Convert to fraction form
    428,673.10/642,878.31 = 296,403.34/x
  3. Step 3: Cross multiply
    428,673.10x = 642,878.31 × 296,403.34
  4. Step 4: Simplify right side
    428,673.10x = 190,551,278,297.56
  5. Step 5: Solve for x
    x = 190,551,278,297.56/428,673.10
  6. Step 6: Final answer
    x = 444,514.20

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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.