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Finding the Fourth Proportional to 518.94, 715.42 and 371.31

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Solution

The fourth proportional to 518.94, 715.42 and 371.31 is: 511.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.94 : 715.42 = 371.31 : x
  2. Step 2: Convert to fraction form
    518.94/715.42 = 371.31/x
  3. Step 3: Cross multiply
    518.94x = 715.42 × 371.31
  4. Step 4: Simplify right side
    518.94x = 265,642.60
  5. Step 5: Solve for x
    x = 265,642.60/518.94
  6. Step 6: Final answer
    x = 511.89

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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.