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Finding the Fourth Proportional to 685,017.64, 945,514.50 and 398,593.24

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Solution

The fourth proportional to 685,017.64, 945,514.50 and 398,593.24 is: 550,169.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,017.64 : 945,514.50 = 398,593.24 : x
  2. Step 2: Convert to fraction form
    685,017.64/945,514.50 = 398,593.24/x
  3. Step 3: Cross multiply
    685,017.64x = 945,514.50 × 398,593.24
  4. Step 4: Simplify right side
    685,017.64x = 376,875,688,021.98
  5. Step 5: Solve for x
    x = 376,875,688,021.98/685,017.64
  6. Step 6: Final answer
    x = 550,169.32

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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.