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Finding the Fourth Proportional to 707.37, 976.08 and 438.15

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Solution

The fourth proportional to 707.37, 976.08 and 438.15 is: 604.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.37 : 976.08 = 438.15 : x
  2. Step 2: Convert to fraction form
    707.37/976.08 = 438.15/x
  3. Step 3: Cross multiply
    707.37x = 976.08 × 438.15
  4. Step 4: Simplify right side
    707.37x = 427,669.45
  5. Step 5: Solve for x
    x = 427,669.45/707.37
  6. Step 6: Final answer
    x = 604.59

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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.