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Finding the Fourth Proportional to 991.41, 1,368.60 and 593.25

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Solution

The fourth proportional to 991.41, 1,368.60 and 593.25 is: 818.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    991.41 : 1,368.60 = 593.25 : x
  2. Step 2: Convert to fraction form
    991.41/1,368.60 = 593.25/x
  3. Step 3: Cross multiply
    991.41x = 1,368.60 × 593.25
  4. Step 4: Simplify right side
    991.41x = 811,921.95
  5. Step 5: Solve for x
    x = 811,921.95/991.41
  6. Step 6: Final answer
    x = 818.96

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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.