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Finding the Fourth Proportional to 505,567.86, 697,679.37 and 279,208.50

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Solution

The fourth proportional to 505,567.86, 697,679.37 and 279,208.50 is: 385,305.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,567.86 : 697,679.37 = 279,208.50 : x
  2. Step 2: Convert to fraction form
    505,567.86/697,679.37 = 279,208.50/x
  3. Step 3: Cross multiply
    505,567.86x = 697,679.37 × 279,208.50
  4. Step 4: Simplify right side
    505,567.86x = 194,798,010,378.65
  5. Step 5: Solve for x
    x = 194,798,010,378.65/505,567.86
  6. Step 6: Final answer
    x = 385,305.37

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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.