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Finding the Fourth Proportional to 511.71, 706.14 and 315.33

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Solution

The fourth proportional to 511.71, 706.14 and 315.33 is: 435.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.71 : 706.14 = 315.33 : x
  2. Step 2: Convert to fraction form
    511.71/706.14 = 315.33/x
  3. Step 3: Cross multiply
    511.71x = 706.14 × 315.33
  4. Step 4: Simplify right side
    511.71x = 222,667.13
  5. Step 5: Solve for x
    x = 222,667.13/511.71
  6. Step 6: Final answer
    x = 435.14

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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.