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Finding the Fourth Proportional to 505,610.64, 697,683 and 279,242.64

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Solution

The fourth proportional to 505,610.64, 697,683 and 279,242.64 is: 385,321.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,610.64 : 697,683 = 279,242.64 : x
  2. Step 2: Convert to fraction form
    505,610.64/697,683 = 279,242.64/x
  3. Step 3: Cross multiply
    505,610.64x = 697,683 × 279,242.64
  4. Step 4: Simplify right side
    505,610.64x = 194,822,842,803.12
  5. Step 5: Solve for x
    x = 194,822,842,803.12/505,610.64
  6. Step 6: Final answer
    x = 385,321.88

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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.