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Finding the Fourth Proportional to 511.73, 705.93 and 315.13

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Solution

The fourth proportional to 511.73, 705.93 and 315.13 is: 434.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.73 : 705.93 = 315.13 : x
  2. Step 2: Convert to fraction form
    511.73/705.93 = 315.13/x
  3. Step 3: Cross multiply
    511.73x = 705.93 × 315.13
  4. Step 4: Simplify right side
    511.73x = 222,459.72
  5. Step 5: Solve for x
    x = 222,459.72/511.73
  6. Step 6: Final answer
    x = 434.72

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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.