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Finding the Fourth Proportional to 681,420.74, 940,401.78 and 375,496.60

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Solution

The fourth proportional to 681,420.74, 940,401.78 and 375,496.60 is: 518,207.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,420.74 : 940,401.78 = 375,496.60 : x
  2. Step 2: Convert to fraction form
    681,420.74/940,401.78 = 375,496.60/x
  3. Step 3: Cross multiply
    681,420.74x = 940,401.78 × 375,496.60
  4. Step 4: Simplify right side
    681,420.74x = 353,117,671,023.95
  5. Step 5: Solve for x
    x = 353,117,671,023.95/681,420.74
  6. Step 6: Final answer
    x = 518,207.99

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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.