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Finding the Fourth Proportional to 639,615.60, 882,671.76 and 353,137.68

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Solution

The fourth proportional to 639,615.60, 882,671.76 and 353,137.68 is: 487,331.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,615.60 : 882,671.76 = 353,137.68 : x
  2. Step 2: Convert to fraction form
    639,615.60/882,671.76 = 353,137.68/x
  3. Step 3: Cross multiply
    639,615.60x = 882,671.76 × 353,137.68
  4. Step 4: Simplify right side
    639,615.60x = 311,704,657,527.92
  5. Step 5: Solve for x
    x = 311,704,657,527.92/639,615.60
  6. Step 6: Final answer
    x = 487,331.23

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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.