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Finding the Fourth Proportional to 505,441.22, 697,490.61 and 279,081.86

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Solution

The fourth proportional to 505,441.22, 697,490.61 and 279,081.86 is: 385,122.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,441.22 : 697,490.61 = 279,081.86 : x
  2. Step 2: Convert to fraction form
    505,441.22/697,490.61 = 279,081.86/x
  3. Step 3: Cross multiply
    505,441.22x = 697,490.61 × 279,081.86
  4. Step 4: Simplify right side
    505,441.22x = 194,656,976,771.34
  5. Step 5: Solve for x
    x = 194,656,976,771.34/505,441.22
  6. Step 6: Final answer
    x = 385,122.88

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1.5x scale

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.