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Finding the Fourth Proportional to 505,386.72, 697,415.28 and 275,939.76

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Solution

The fourth proportional to 505,386.72, 697,415.28 and 275,939.76 is: 380,786.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,386.72 : 697,415.28 = 275,939.76 : x
  2. Step 2: Convert to fraction form
    505,386.72/697,415.28 = 275,939.76/x
  3. Step 3: Cross multiply
    505,386.72x = 697,415.28 × 275,939.76
  4. Step 4: Simplify right side
    505,386.72x = 192,444,604,983.53
  5. Step 5: Solve for x
    x = 192,444,604,983.53/505,386.72
  6. Step 6: Final answer
    x = 380,786.83

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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.