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Finding the Fourth Proportional to 639,134.78, 882,024.31 and 352,673.31

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Solution

The fourth proportional to 639,134.78, 882,024.31 and 352,673.31 is: 486,699.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,134.78 : 882,024.31 = 352,673.31 : x
  2. Step 2: Convert to fraction form
    639,134.78/882,024.31 = 352,673.31/x
  3. Step 3: Cross multiply
    639,134.78x = 882,024.31 × 352,673.31
  4. Step 4: Simplify right side
    639,134.78x = 311,066,434,672.81
  5. Step 5: Solve for x
    x = 311,066,434,672.81/639,134.78
  6. Step 6: Final answer
    x = 486,699.28

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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.