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Finding the Fourth Proportional to 639,052.34, 958,709.72 and 259,972.11

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Solution

The fourth proportional to 639,052.34, 958,709.72 and 259,972.11 is: 390,011.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,052.34 : 958,709.72 = 259,972.11 : x
  2. Step 2: Convert to fraction form
    639,052.34/958,709.72 = 259,972.11/x
  3. Step 3: Cross multiply
    639,052.34x = 958,709.72 × 259,972.11
  4. Step 4: Simplify right side
    639,052.34x = 249,237,786,739.47
  5. Step 5: Solve for x
    x = 249,237,786,739.47/639,052.34
  6. Step 6: Final answer
    x = 390,011.54

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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.