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Finding the Fourth Proportional to 639,502.20, 959,690.70 and 355,192.20

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Solution

The fourth proportional to 639,502.20, 959,690.70 and 355,192.20 is: 533,031.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,502.20 : 959,690.70 = 355,192.20 : x
  2. Step 2: Convert to fraction form
    639,502.20/959,690.70 = 355,192.20/x
  3. Step 3: Cross multiply
    639,502.20x = 959,690.70 × 355,192.20
  4. Step 4: Simplify right side
    639,502.20x = 340,874,651,052.54
  5. Step 5: Solve for x
    x = 340,874,651,052.54/639,502.20
  6. Step 6: Final answer
    x = 533,031.24

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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.