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Finding the Fourth Proportional to 511.66, 705.72 and 325.18

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Solution

The fourth proportional to 511.66, 705.72 and 325.18 is: 448.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.66 : 705.72 = 325.18 : x
  2. Step 2: Convert to fraction form
    511.66/705.72 = 325.18/x
  3. Step 3: Cross multiply
    511.66x = 705.72 × 325.18
  4. Step 4: Simplify right side
    511.66x = 229,486.03
  5. Step 5: Solve for x
    x = 229,486.03/511.66
  6. Step 6: Final answer
    x = 448.51

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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.