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Finding the Fourth Proportional to 511.48, 705.81 and 345.66

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Solution

The fourth proportional to 511.48, 705.81 and 345.66 is: 476.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.48 : 705.81 = 345.66 : x
  2. Step 2: Convert to fraction form
    511.48/705.81 = 345.66/x
  3. Step 3: Cross multiply
    511.48x = 705.81 × 345.66
  4. Step 4: Simplify right side
    511.48x = 243,970.28
  5. Step 5: Solve for x
    x = 243,970.28/511.48
  6. Step 6: Final answer
    x = 476.99

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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.