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Finding the Fourth Proportional to 639,102.89, 882,281.59 and 397,463.31

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Solution

The fourth proportional to 639,102.89, 882,281.59 and 397,463.31 is: 548,698.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,102.89 : 882,281.59 = 397,463.31 : x
  2. Step 2: Convert to fraction form
    639,102.89/882,281.59 = 397,463.31/x
  3. Step 3: Cross multiply
    639,102.89x = 882,281.59 × 397,463.31
  4. Step 4: Simplify right side
    639,102.89x = 350,674,560,119.81
  5. Step 5: Solve for x
    x = 350,674,560,119.81/639,102.89
  6. Step 6: Final answer
    x = 548,698.13

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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.