Home / 639,445.98-958,961.30-212,867.22

Finding the Fourth Proportional to 639,445.98, 958,961.30 and 212,867.22

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Solution

The fourth proportional to 639,445.98, 958,961.30 and 212,867.22 is: 319,231.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,445.98 : 958,961.30 = 212,867.22 : x
  2. Step 2: Convert to fraction form
    639,445.98/958,961.30 = 212,867.22/x
  3. Step 3: Cross multiply
    639,445.98x = 958,961.30 × 212,867.22
  4. Step 4: Simplify right side
    639,445.98x = 204,131,426,018.59
  5. Step 5: Solve for x
    x = 204,131,426,018.59/639,445.98
  6. Step 6: Final answer
    x = 319,231.70

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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.