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Finding the Fourth Proportional to 511.45, 705.59 and 356.29

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Solution

The fourth proportional to 511.45, 705.59 and 356.29 is: 491.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.45 : 705.59 = 356.29 : x
  2. Step 2: Convert to fraction form
    511.45/705.59 = 356.29/x
  3. Step 3: Cross multiply
    511.45x = 705.59 × 356.29
  4. Step 4: Simplify right side
    511.45x = 251,392.45
  5. Step 5: Solve for x
    x = 251,392.45/511.45
  6. Step 6: Final answer
    x = 491.53

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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.