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Finding the Fourth Proportional to 969.85, 1,338.38 and 527.77

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Solution

The fourth proportional to 969.85, 1,338.38 and 527.77 is: 728.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.85 : 1,338.38 = 527.77 : x
  2. Step 2: Convert to fraction form
    969.85/1,338.38 = 527.77/x
  3. Step 3: Cross multiply
    969.85x = 1,338.38 × 527.77
  4. Step 4: Simplify right side
    969.85x = 706,356.81
  5. Step 5: Solve for x
    x = 706,356.81/969.85
  6. Step 6: Final answer
    x = 728.32

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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.