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Finding the Fourth Proportional to 1,141.93, 1,712.40 and 411.49

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Solution

The fourth proportional to 1,141.93, 1,712.40 and 411.49 is: 617.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.93 : 1,712.40 = 411.49 : x
  2. Step 2: Convert to fraction form
    1,141.93/1,712.40 = 411.49/x
  3. Step 3: Cross multiply
    1,141.93x = 1,712.40 × 411.49
  4. Step 4: Simplify right side
    1,141.93x = 704,635.48
  5. Step 5: Solve for x
    x = 704,635.48/1,141.93
  6. Step 6: Final answer
    x = 617.06

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.