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Finding the Fourth Proportional to 639,131.78, 882,020.32 and 352,670.32

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Solution

The fourth proportional to 639,131.78, 882,020.32 and 352,670.32 is: 486,695.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,131.78 : 882,020.32 = 352,670.32 : x
  2. Step 2: Convert to fraction form
    639,131.78/882,020.32 = 352,670.32/x
  3. Step 3: Cross multiply
    639,131.78x = 882,020.32 × 352,670.32
  4. Step 4: Simplify right side
    639,131.78x = 311,062,388,500.90
  5. Step 5: Solve for x
    x = 311,062,388,500.90/639,131.78
  6. Step 6: Final answer
    x = 486,695.23

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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.