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Finding the Fourth Proportional to 639,644.64, 882,761.40 and 367,800.88

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Solution

The fourth proportional to 639,644.64, 882,761.40 and 367,800.88 is: 507,595.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,644.64 : 882,761.40 = 367,800.88 : x
  2. Step 2: Convert to fraction form
    639,644.64/882,761.40 = 367,800.88/x
  3. Step 3: Cross multiply
    639,644.64x = 882,761.40 × 367,800.88
  4. Step 4: Simplify right side
    639,644.64x = 324,680,419,750.03
  5. Step 5: Solve for x
    x = 324,680,419,750.03/639,644.64
  6. Step 6: Final answer
    x = 507,595.00

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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.