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Finding the Fourth Proportional to 431.58, 595.38 and 313.25

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Solution

The fourth proportional to 431.58, 595.38 and 313.25 is: 432.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.58 : 595.38 = 313.25 : x
  2. Step 2: Convert to fraction form
    431.58/595.38 = 313.25/x
  3. Step 3: Cross multiply
    431.58x = 595.38 × 313.25
  4. Step 4: Simplify right side
    431.58x = 186,504.33
  5. Step 5: Solve for x
    x = 186,504.33/431.58
  6. Step 6: Final answer
    x = 432.15

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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.