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Finding the Fourth Proportional to 317.90, 436.37 and 282.14

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Solution

The fourth proportional to 317.90, 436.37 and 282.14 is: 387.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.90 : 436.37 = 282.14 : x
  2. Step 2: Convert to fraction form
    317.90/436.37 = 282.14/x
  3. Step 3: Cross multiply
    317.90x = 436.37 × 282.14
  4. Step 4: Simplify right side
    317.90x = 123,117.11
  5. Step 5: Solve for x
    x = 123,117.11/317.90
  6. Step 6: Final answer
    x = 387.28

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.