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Finding the Fourth Proportional to 681,039, 939,840.36 and 375,122.28

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Solution

The fourth proportional to 681,039, 939,840.36 and 375,122.28 is: 517,672.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,039 : 939,840.36 = 375,122.28 : x
  2. Step 2: Convert to fraction form
    681,039/939,840.36 = 375,122.28/x
  3. Step 3: Cross multiply
    681,039x = 939,840.36 × 375,122.28
  4. Step 4: Simplify right side
    681,039x = 352,555,058,679.22
  5. Step 5: Solve for x
    x = 352,555,058,679.22/681,039
  6. Step 6: Final answer
    x = 517,672.35

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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.