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Finding the Fourth Proportional to 505,401.68, 697,454.52 and 279,047.36

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Solution

The fourth proportional to 505,401.68, 697,454.52 and 279,047.36 is: 385,085.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,401.68 : 697,454.52 = 279,047.36 : x
  2. Step 2: Convert to fraction form
    505,401.68/697,454.52 = 279,047.36/x
  3. Step 3: Cross multiply
    505,401.68x = 697,454.52 × 279,047.36
  4. Step 4: Simplify right side
    505,401.68x = 194,622,842,526.07
  5. Step 5: Solve for x
    x = 194,622,842,526.07/505,401.68
  6. Step 6: Final answer
    x = 385,085.47

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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.