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Finding the Fourth Proportional to 505,475.88, 697,557.32 and 279,121.38

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Solution

The fourth proportional to 505,475.88, 697,557.32 and 279,121.38 is: 385,187.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,475.88 : 697,557.32 = 279,121.38 : x
  2. Step 2: Convert to fraction form
    505,475.88/697,557.32 = 279,121.38/x
  3. Step 3: Cross multiply
    505,475.88x = 697,557.32 × 279,121.38
  4. Step 4: Simplify right side
    505,475.88x = 194,703,161,787.50
  5. Step 5: Solve for x
    x = 194,703,161,787.50/505,475.88
  6. Step 6: Final answer
    x = 385,187.84

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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.