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Finding the Fourth Proportional to 2,176.53, 3,264.90 and 715.68

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Solution

The fourth proportional to 2,176.53, 3,264.90 and 715.68 is: 1,073.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,176.53 : 3,264.90 = 715.68 : x
  2. Step 2: Convert to fraction form
    2,176.53/3,264.90 = 715.68/x
  3. Step 3: Cross multiply
    2,176.53x = 3,264.90 × 715.68
  4. Step 4: Simplify right side
    2,176.53x = 2,336,623.63
  5. Step 5: Solve for x
    x = 2,336,623.63/2,176.53
  6. Step 6: Final answer
    x = 1,073.55

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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.