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Finding the Fourth Proportional to 639,040.83, 957,832.36 and 399,264.98

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Solution

The fourth proportional to 639,040.83, 957,832.36 and 399,264.98 is: 598,442.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,040.83 : 957,832.36 = 399,264.98 : x
  2. Step 2: Convert to fraction form
    639,040.83/957,832.36 = 399,264.98/x
  3. Step 3: Cross multiply
    639,040.83x = 957,832.36 × 399,264.98
  4. Step 4: Simplify right side
    639,040.83x = 382,428,922,542.28
  5. Step 5: Solve for x
    x = 382,428,922,542.28/639,040.83
  6. Step 6: Final answer
    x = 598,442.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.