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Finding the Fourth Proportional to 437.58, 656.37 and 386.82

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Solution

The fourth proportional to 437.58, 656.37 and 386.82 is: 580.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.58 : 656.37 = 386.82 : x
  2. Step 2: Convert to fraction form
    437.58/656.37 = 386.82/x
  3. Step 3: Cross multiply
    437.58x = 656.37 × 386.82
  4. Step 4: Simplify right side
    437.58x = 253,897.04
  5. Step 5: Solve for x
    x = 253,897.04/437.58
  6. Step 6: Final answer
    x = 580.23

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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.