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Finding the Fourth Proportional to 989.26, 1,365.30 and 575.26

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Solution

The fourth proportional to 989.26, 1,365.30 and 575.26 is: 793.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.26 : 1,365.30 = 575.26 : x
  2. Step 2: Convert to fraction form
    989.26/1,365.30 = 575.26/x
  3. Step 3: Cross multiply
    989.26x = 1,365.30 × 575.26
  4. Step 4: Simplify right side
    989.26x = 785,402.48
  5. Step 5: Solve for x
    x = 785,402.48/989.26
  6. Step 6: Final answer
    x = 793.93

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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.