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Finding the Fourth Proportional to 639,642.30, 882,700.41 and 353,164.42

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Solution

The fourth proportional to 639,642.30, 882,700.41 and 353,164.42 is: 487,363.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,642.30 : 882,700.41 = 353,164.42 : x
  2. Step 2: Convert to fraction form
    639,642.30/882,700.41 = 353,164.42/x
  3. Step 3: Cross multiply
    639,642.30x = 882,700.41 × 353,164.42
  4. Step 4: Simplify right side
    639,642.30x = 311,738,378,331.41
  5. Step 5: Solve for x
    x = 311,738,378,331.41/639,642.30
  6. Step 6: Final answer
    x = 487,363.61

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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.