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Finding the Fourth Proportional to 1,145.50, 1,717.57 and 451.35

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Solution

The fourth proportional to 1,145.50, 1,717.57 and 451.35 is: 676.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.50 : 1,717.57 = 451.35 : x
  2. Step 2: Convert to fraction form
    1,145.50/1,717.57 = 451.35/x
  3. Step 3: Cross multiply
    1,145.50x = 1,717.57 × 451.35
  4. Step 4: Simplify right side
    1,145.50x = 775,225.22
  5. Step 5: Solve for x
    x = 775,225.22/1,145.50
  6. Step 6: Final answer
    x = 676.76

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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.