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Finding the Fourth Proportional to 639,339.72, 882,284.47 and 352,859.80

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Solution

The fourth proportional to 639,339.72, 882,284.47 and 352,859.80 is: 486,944.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,339.72 : 882,284.47 = 352,859.80 : x
  2. Step 2: Convert to fraction form
    639,339.72/882,284.47 = 352,859.80/x
  3. Step 3: Cross multiply
    639,339.72x = 882,284.47 × 352,859.80
  4. Step 4: Simplify right side
    639,339.72x = 311,322,718,539.45
  5. Step 5: Solve for x
    x = 311,322,718,539.45/639,339.72
  6. Step 6: Final answer
    x = 486,944.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.