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Finding the Fourth Proportional to 505,481.76, 697,567.98 and 279,127.20

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Solution

The fourth proportional to 505,481.76, 697,567.98 and 279,127.20 is: 385,197.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,481.76 : 697,567.98 = 279,127.20 : x
  2. Step 2: Convert to fraction form
    505,481.76/697,567.98 = 279,127.20/x
  3. Step 3: Cross multiply
    505,481.76x = 697,567.98 × 279,127.20
  4. Step 4: Simplify right side
    505,481.76x = 194,710,197,067.06
  5. Step 5: Solve for x
    x = 194,710,197,067.06/505,481.76
  6. Step 6: Final answer
    x = 385,197.28

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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.