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Finding the Fourth Proportional to 639,875.32, 959,714.34 and 213,418.60

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Solution

The fourth proportional to 639,875.32, 959,714.34 and 213,418.60 is: 320,095.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,875.32 : 959,714.34 = 213,418.60 : x
  2. Step 2: Convert to fraction form
    639,875.32/959,714.34 = 213,418.60/x
  3. Step 3: Cross multiply
    639,875.32x = 959,714.34 × 213,418.60
  4. Step 4: Simplify right side
    639,875.32x = 204,820,890,842.72
  5. Step 5: Solve for x
    x = 204,820,890,842.72/639,875.32
  6. Step 6: Final answer
    x = 320,095.00

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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.