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Finding the Fourth Proportional to 715.96, 1,074.55 and 369.51

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Solution

The fourth proportional to 715.96, 1,074.55 and 369.51 is: 554.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.96 : 1,074.55 = 369.51 : x
  2. Step 2: Convert to fraction form
    715.96/1,074.55 = 369.51/x
  3. Step 3: Cross multiply
    715.96x = 1,074.55 × 369.51
  4. Step 4: Simplify right side
    715.96x = 397,056.97
  5. Step 5: Solve for x
    x = 397,056.97/715.96
  6. Step 6: Final answer
    x = 554.58

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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.