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Finding the Fourth Proportional to 936.77, 1,292.67 and 517.11

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Solution

The fourth proportional to 936.77, 1,292.67 and 517.11 is: 713.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.77 : 1,292.67 = 517.11 : x
  2. Step 2: Convert to fraction form
    936.77/1,292.67 = 517.11/x
  3. Step 3: Cross multiply
    936.77x = 1,292.67 × 517.11
  4. Step 4: Simplify right side
    936.77x = 668,449.68
  5. Step 5: Solve for x
    x = 668,449.68/936.77
  6. Step 6: Final answer
    x = 713.57

Related Problems

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Half scale
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Double scale
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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.