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Finding the Fourth Proportional to 639,697.04, 959,479.88 and 213,186.94

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Solution

The fourth proportional to 639,697.04, 959,479.88 and 213,186.94 is: 319,758.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,697.04 : 959,479.88 = 213,186.94 : x
  2. Step 2: Convert to fraction form
    639,697.04/959,479.88 = 213,186.94/x
  3. Step 3: Cross multiply
    639,697.04x = 959,479.88 × 213,186.94
  4. Step 4: Simplify right side
    639,697.04x = 204,548,577,343.31
  5. Step 5: Solve for x
    x = 204,548,577,343.31/639,697.04
  6. Step 6: Final answer
    x = 319,758.52

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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.