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Finding the Fourth Proportional to 511.86, 705.66 and 400.88

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Solution

The fourth proportional to 511.86, 705.66 and 400.88 is: 552.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.86 : 705.66 = 400.88 : x
  2. Step 2: Convert to fraction form
    511.86/705.66 = 400.88/x
  3. Step 3: Cross multiply
    511.86x = 705.66 × 400.88
  4. Step 4: Simplify right side
    511.86x = 282,884.98
  5. Step 5: Solve for x
    x = 282,884.98/511.86
  6. Step 6: Final answer
    x = 552.66

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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.