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Finding the Fourth Proportional to 505,618.61, 697,757.29 and 279,264.11

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Solution

The fourth proportional to 505,618.61, 697,757.29 and 279,264.11 is: 385,386.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,618.61 : 697,757.29 = 279,264.11 : x
  2. Step 2: Convert to fraction form
    505,618.61/697,757.29 = 279,264.11/x
  3. Step 3: Cross multiply
    505,618.61x = 697,757.29 × 279,264.11
  4. Step 4: Simplify right side
    505,618.61x = 194,858,564,400.92
  5. Step 5: Solve for x
    x = 194,858,564,400.92/505,618.61
  6. Step 6: Final answer
    x = 385,386.46

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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.