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Finding the Fourth Proportional to 707.96, 976.71 and 445.52

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Solution

The fourth proportional to 707.96, 976.71 and 445.52 is: 614.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.96 : 976.71 = 445.52 : x
  2. Step 2: Convert to fraction form
    707.96/976.71 = 445.52/x
  3. Step 3: Cross multiply
    707.96x = 976.71 × 445.52
  4. Step 4: Simplify right side
    707.96x = 435,143.84
  5. Step 5: Solve for x
    x = 435,143.84/707.96
  6. Step 6: Final answer
    x = 614.64

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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.