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Finding the Fourth Proportional to 639,673.43, 882,726.21 and 353,187.37

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Solution

The fourth proportional to 639,673.43, 882,726.21 and 353,187.37 is: 487,385.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,673.43 : 882,726.21 = 353,187.37 : x
  2. Step 2: Convert to fraction form
    639,673.43/882,726.21 = 353,187.37/x
  3. Step 3: Cross multiply
    639,673.43x = 882,726.21 × 353,187.37
  4. Step 4: Simplify right side
    639,673.43x = 311,767,748,539.97
  5. Step 5: Solve for x
    x = 311,767,748,539.97/639,673.43
  6. Step 6: Final answer
    x = 487,385.80

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1.5x scale

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.