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Finding the Fourth Proportional to 505,474.88, 697,555.94 and 279,120.38

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Solution

The fourth proportional to 505,474.88, 697,555.94 and 279,120.38 is: 385,186.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,474.88 : 697,555.94 = 279,120.38 : x
  2. Step 2: Convert to fraction form
    505,474.88/697,555.94 = 279,120.38/x
  3. Step 3: Cross multiply
    505,474.88x = 697,555.94 × 279,120.38
  4. Step 4: Simplify right side
    505,474.88x = 194,702,074,160.68
  5. Step 5: Solve for x
    x = 194,702,074,160.68/505,474.88
  6. Step 6: Final answer
    x = 385,186.45

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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.