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Finding the Fourth Proportional to 505,411.22, 697,449.20 and 279,051.86

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Solution

The fourth proportional to 505,411.22, 697,449.20 and 279,051.86 is: 385,081.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,411.22 : 697,449.20 = 279,051.86 : x
  2. Step 2: Convert to fraction form
    505,411.22/697,449.20 = 279,051.86/x
  3. Step 3: Cross multiply
    505,411.22x = 697,449.20 × 279,051.86
  4. Step 4: Simplify right side
    505,411.22x = 194,624,496,515.51
  5. Step 5: Solve for x
    x = 194,624,496,515.51/505,411.22
  6. Step 6: Final answer
    x = 385,081.47

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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.