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Finding the Fourth Proportional to 1,113.61, 1,536.75 and 616.22

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Solution

The fourth proportional to 1,113.61, 1,536.75 and 616.22 is: 850.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.61 : 1,536.75 = 616.22 : x
  2. Step 2: Convert to fraction form
    1,113.61/1,536.75 = 616.22/x
  3. Step 3: Cross multiply
    1,113.61x = 1,536.75 × 616.22
  4. Step 4: Simplify right side
    1,113.61x = 946,968.40
  5. Step 5: Solve for x
    x = 946,968.40/1,113.61
  6. Step 6: Final answer
    x = 850.36

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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.