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Finding the Fourth Proportional to 681,649.20, 940,637.88 and 375,665.76

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Solution

The fourth proportional to 681,649.20, 940,637.88 and 375,665.76 is: 518,397.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,649.20 : 940,637.88 = 375,665.76 : x
  2. Step 2: Convert to fraction form
    681,649.20/940,637.88 = 375,665.76/x
  3. Step 3: Cross multiply
    681,649.20x = 940,637.88 × 375,665.76
  4. Step 4: Simplify right side
    681,649.20x = 353,365,444,074.99
  5. Step 5: Solve for x
    x = 353,365,444,074.99/681,649.20
  6. Step 6: Final answer
    x = 518,397.80

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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.