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Finding the Fourth Proportional to 707.19, 975.97 and 396.69

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Solution

The fourth proportional to 707.19, 975.97 and 396.69 is: 547.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.19 : 975.97 = 396.69 : x
  2. Step 2: Convert to fraction form
    707.19/975.97 = 396.69/x
  3. Step 3: Cross multiply
    707.19x = 975.97 × 396.69
  4. Step 4: Simplify right side
    707.19x = 387,155.56
  5. Step 5: Solve for x
    x = 387,155.56/707.19
  6. Step 6: Final answer
    x = 547.46

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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.