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Finding the Fourth Proportional to 707.58, 976.59 and 486.81

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Solution

The fourth proportional to 707.58, 976.59 and 486.81 is: 671.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.58 : 976.59 = 486.81 : x
  2. Step 2: Convert to fraction form
    707.58/976.59 = 486.81/x
  3. Step 3: Cross multiply
    707.58x = 976.59 × 486.81
  4. Step 4: Simplify right side
    707.58x = 475,413.78
  5. Step 5: Solve for x
    x = 475,413.78/707.58
  6. Step 6: Final answer
    x = 671.89

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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.