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Finding the Fourth Proportional to 976.58, 1,347.43 and 578.26

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Solution

The fourth proportional to 976.58, 1,347.43 and 578.26 is: 797.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.58 : 1,347.43 = 578.26 : x
  2. Step 2: Convert to fraction form
    976.58/1,347.43 = 578.26/x
  3. Step 3: Cross multiply
    976.58x = 1,347.43 × 578.26
  4. Step 4: Simplify right side
    976.58x = 779,164.87
  5. Step 5: Solve for x
    x = 779,164.87/976.58
  6. Step 6: Final answer
    x = 797.85

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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.