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Finding the Fourth Proportional to 965.06, 1,331.45 and 572.02

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Solution

The fourth proportional to 965.06, 1,331.45 and 572.02 is: 789.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.06 : 1,331.45 = 572.02 : x
  2. Step 2: Convert to fraction form
    965.06/1,331.45 = 572.02/x
  3. Step 3: Cross multiply
    965.06x = 1,331.45 × 572.02
  4. Step 4: Simplify right side
    965.06x = 761,616.03
  5. Step 5: Solve for x
    x = 761,616.03/965.06
  6. Step 6: Final answer
    x = 789.19

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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.