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Finding the Fourth Proportional to 639,488.64, 882,495.90 and 349,100.40

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Solution

The fourth proportional to 639,488.64, 882,495.90 and 349,100.40 is: 481,759.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,488.64 : 882,495.90 = 349,100.40 : x
  2. Step 2: Convert to fraction form
    639,488.64/882,495.90 = 349,100.40/x
  3. Step 3: Cross multiply
    639,488.64x = 882,495.90 × 349,100.40
  4. Step 4: Simplify right side
    639,488.64x = 308,079,671,688.36
  5. Step 5: Solve for x
    x = 308,079,671,688.36/639,488.64
  6. Step 6: Final answer
    x = 481,759.41

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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.