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Finding the Fourth Proportional to 990.94, 1,367.77 and 592.69

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Solution

The fourth proportional to 990.94, 1,367.77 and 592.69 is: 818.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.94 : 1,367.77 = 592.69 : x
  2. Step 2: Convert to fraction form
    990.94/1,367.77 = 592.69/x
  3. Step 3: Cross multiply
    990.94x = 1,367.77 × 592.69
  4. Step 4: Simplify right side
    990.94x = 810,663.60
  5. Step 5: Solve for x
    x = 810,663.60/990.94
  6. Step 6: Final answer
    x = 818.08

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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.