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Finding the Fourth Proportional to 511.38, 705.69 and 345.51

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Solution

The fourth proportional to 511.38, 705.69 and 345.51 is: 476.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.38 : 705.69 = 345.51 : x
  2. Step 2: Convert to fraction form
    511.38/705.69 = 345.51/x
  3. Step 3: Cross multiply
    511.38x = 705.69 × 345.51
  4. Step 4: Simplify right side
    511.38x = 243,822.95
  5. Step 5: Solve for x
    x = 243,822.95/511.38
  6. Step 6: Final answer
    x = 476.79

Related Problems

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Double scale
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Similar ratio
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1.5x scale

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.