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Finding the Fourth Proportional to 505,765.86, 697,971 and 279,425.94

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Solution

The fourth proportional to 505,765.86, 697,971 and 279,425.94 is: 385,615.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,765.86 : 697,971 = 279,425.94 : x
  2. Step 2: Convert to fraction form
    505,765.86/697,971 = 279,425.94/x
  3. Step 3: Cross multiply
    505,765.86x = 697,971 × 279,425.94
  4. Step 4: Simplify right side
    505,765.86x = 195,031,202,767.74
  5. Step 5: Solve for x
    x = 195,031,202,767.74/505,765.86
  6. Step 6: Final answer
    x = 385,615.59

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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.