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Finding the Fourth Proportional to 969.63, 1,337.88 and 571.17

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Solution

The fourth proportional to 969.63, 1,337.88 and 571.17 is: 788.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.63 : 1,337.88 = 571.17 : x
  2. Step 2: Convert to fraction form
    969.63/1,337.88 = 571.17/x
  3. Step 3: Cross multiply
    969.63x = 1,337.88 × 571.17
  4. Step 4: Simplify right side
    969.63x = 764,156.92
  5. Step 5: Solve for x
    x = 764,156.92/969.63
  6. Step 6: Final answer
    x = 788.09

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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.