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Finding the Fourth Proportional to 639,441.98, 958,955.31 and 212,863.22

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Solution

The fourth proportional to 639,441.98, 958,955.31 and 212,863.22 is: 319,225.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,441.98 : 958,955.31 = 212,863.22 : x
  2. Step 2: Convert to fraction form
    639,441.98/958,955.31 = 212,863.22/x
  3. Step 3: Cross multiply
    639,441.98x = 958,955.31 × 212,863.22
  4. Step 4: Simplify right side
    639,441.98x = 204,126,315,122.70
  5. Step 5: Solve for x
    x = 204,126,315,122.70/639,441.98
  6. Step 6: Final answer
    x = 319,225.70

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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.