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Finding the Fourth Proportional to 976.77, 1,347.18 and 583.38

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Solution

The fourth proportional to 976.77, 1,347.18 and 583.38 is: 804.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.77 : 1,347.18 = 583.38 : x
  2. Step 2: Convert to fraction form
    976.77/1,347.18 = 583.38/x
  3. Step 3: Cross multiply
    976.77x = 1,347.18 × 583.38
  4. Step 4: Simplify right side
    976.77x = 785,917.87
  5. Step 5: Solve for x
    x = 785,917.87/976.77
  6. Step 6: Final answer
    x = 804.61

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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.