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Finding the Fourth Proportional to 991.33, 1,368.37 and 598.39

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Solution

The fourth proportional to 991.33, 1,368.37 and 598.39 is: 825.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    991.33 : 1,368.37 = 598.39 : x
  2. Step 2: Convert to fraction form
    991.33/1,368.37 = 598.39/x
  3. Step 3: Cross multiply
    991.33x = 1,368.37 × 598.39
  4. Step 4: Simplify right side
    991.33x = 818,818.92
  5. Step 5: Solve for x
    x = 818,818.92/991.33
  6. Step 6: Final answer
    x = 825.98

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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.