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Finding the Fourth Proportional to 959.11, 1,323.71 and 539.63

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Solution

The fourth proportional to 959.11, 1,323.71 and 539.63 is: 744.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.11 : 1,323.71 = 539.63 : x
  2. Step 2: Convert to fraction form
    959.11/1,323.71 = 539.63/x
  3. Step 3: Cross multiply
    959.11x = 1,323.71 × 539.63
  4. Step 4: Simplify right side
    959.11x = 714,311.30
  5. Step 5: Solve for x
    x = 714,311.30/959.11
  6. Step 6: Final answer
    x = 744.77

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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.