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Finding the Fourth Proportional to 639,585.68, 959,365.34 and 213,152.47

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Solution

The fourth proportional to 639,585.68, 959,365.34 and 213,152.47 is: 319,724.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,585.68 : 959,365.34 = 213,152.47 : x
  2. Step 2: Convert to fraction form
    639,585.68/959,365.34 = 213,152.47/x
  3. Step 3: Cross multiply
    639,585.68x = 959,365.34 × 213,152.47
  4. Step 4: Simplify right side
    639,585.68x = 204,491,093,585.48
  5. Step 5: Solve for x
    x = 204,491,093,585.48/639,585.68
  6. Step 6: Final answer
    x = 319,724.32

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1.5x scale

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.