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Finding the Fourth Proportional to 639,308.70, 959,481.45 and 618,572.70

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Solution

The fourth proportional to 639,308.70, 959,481.45 and 618,572.70 is: 928,360.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,308.70 : 959,481.45 = 618,572.70 : x
  2. Step 2: Convert to fraction form
    639,308.70/959,481.45 = 618,572.70/x
  3. Step 3: Cross multiply
    639,308.70x = 959,481.45 × 618,572.70
  4. Step 4: Simplify right side
    639,308.70x = 593,509,031,126.42
  5. Step 5: Solve for x
    x = 593,509,031,126.42/639,308.70
  6. Step 6: Final answer
    x = 928,360.64

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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.