Home / 505,356.03-697,391.78-279,001.53

Finding the Fourth Proportional to 505,356.03, 697,391.78 and 279,001.53

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Solution

The fourth proportional to 505,356.03, 697,391.78 and 279,001.53 is: 385,022.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,356.03 : 697,391.78 = 279,001.53 : x
  2. Step 2: Convert to fraction form
    505,356.03/697,391.78 = 279,001.53/x
  3. Step 3: Cross multiply
    505,356.03x = 697,391.78 × 279,001.53
  4. Step 4: Simplify right side
    505,356.03x = 194,573,372,234.42
  5. Step 5: Solve for x
    x = 194,573,372,234.42/505,356.03
  6. Step 6: Final answer
    x = 385,022.36

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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.