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Finding the Fourth Proportional to 505,759.86, 697,962.69 and 279,419.94

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Solution

The fourth proportional to 505,759.86, 697,962.69 and 279,419.94 is: 385,607.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,759.86 : 697,962.69 = 279,419.94 : x
  2. Step 2: Convert to fraction form
    505,759.86/697,962.69 = 279,419.94/x
  3. Step 3: Cross multiply
    505,759.86x = 697,962.69 × 279,419.94
  4. Step 4: Simplify right side
    505,759.86x = 195,024,692,962.04
  5. Step 5: Solve for x
    x = 195,024,692,962.04/505,759.86
  6. Step 6: Final answer
    x = 385,607.30

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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.