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Finding the Fourth Proportional to 639,604.10, 882,656.25 and 349,216.58

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Solution

The fourth proportional to 639,604.10, 882,656.25 and 349,216.58 is: 481,920.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,604.10 : 882,656.25 = 349,216.58 : x
  2. Step 2: Convert to fraction form
    639,604.10/882,656.25 = 349,216.58/x
  3. Step 3: Cross multiply
    639,604.10x = 882,656.25 × 349,216.58
  4. Step 4: Simplify right side
    639,604.10x = 308,238,196,940.63
  5. Step 5: Solve for x
    x = 308,238,196,940.63/639,604.10
  6. Step 6: Final answer
    x = 481,920.30

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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.