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Finding the Fourth Proportional to 639,722.88, 882,817.56 and 353,243.52

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Solution

The fourth proportional to 639,722.88, 882,817.56 and 353,243.52 is: 487,476.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,722.88 : 882,817.56 = 353,243.52 : x
  2. Step 2: Convert to fraction form
    639,722.88/882,817.56 = 353,243.52/x
  3. Step 3: Cross multiply
    639,722.88x = 882,817.56 × 353,243.52
  4. Step 4: Simplify right side
    639,722.88x = 311,849,582,412.21
  5. Step 5: Solve for x
    x = 311,849,582,412.21/639,722.88
  6. Step 6: Final answer
    x = 487,476.05

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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.