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Finding the Fourth Proportional to 505,243.12, 697,235.40 and 278,888.56

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Solution

The fourth proportional to 505,243.12, 697,235.40 and 278,888.56 is: 384,866.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,243.12 : 697,235.40 = 278,888.56 : x
  2. Step 2: Convert to fraction form
    505,243.12/697,235.40 = 278,888.56/x
  3. Step 3: Cross multiply
    505,243.12x = 697,235.40 × 278,888.56
  4. Step 4: Simplify right side
    505,243.12x = 194,450,976,687.02
  5. Step 5: Solve for x
    x = 194,450,976,687.02/505,243.12
  6. Step 6: Final answer
    x = 384,866.15

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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.