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Finding the Fourth Proportional to 505,802.88, 697,999.68 and 279,469.44

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Solution

The fourth proportional to 505,802.88, 697,999.68 and 279,469.44 is: 385,663.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,802.88 : 697,999.68 = 279,469.44 : x
  2. Step 2: Convert to fraction form
    505,802.88/697,999.68 = 279,469.44/x
  3. Step 3: Cross multiply
    505,802.88x = 697,999.68 × 279,469.44
  4. Step 4: Simplify right side
    505,802.88x = 195,069,579,689.78
  5. Step 5: Solve for x
    x = 195,069,579,689.78/505,802.88
  6. Step 6: Final answer
    x = 385,663.24

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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.