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Finding the Fourth Proportional to 505,065.56, 697,109.76 and 290,330.20

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Solution

The fourth proportional to 505,065.56, 697,109.76 and 290,330.20 is: 400,724.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,065.56 : 697,109.76 = 290,330.20 : x
  2. Step 2: Convert to fraction form
    505,065.56/697,109.76 = 290,330.20/x
  3. Step 3: Cross multiply
    505,065.56x = 697,109.76 × 290,330.20
  4. Step 4: Simplify right side
    505,065.56x = 202,392,016,042.75
  5. Step 5: Solve for x
    x = 202,392,016,042.75/505,065.56
  6. Step 6: Final answer
    x = 400,724.25

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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.