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Finding the Fourth Proportional to 639,602.34, 958,353.75 and 218,648.58

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Solution

The fourth proportional to 639,602.34, 958,353.75 and 218,648.58 is: 327,614.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,602.34 : 958,353.75 = 218,648.58 : x
  2. Step 2: Convert to fraction form
    639,602.34/958,353.75 = 218,648.58/x
  3. Step 3: Cross multiply
    639,602.34x = 958,353.75 × 218,648.58
  4. Step 4: Simplify right side
    639,602.34x = 209,542,686,575.18
  5. Step 5: Solve for x
    x = 209,542,686,575.18/639,602.34
  6. Step 6: Final answer
    x = 327,614.01

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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.