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Finding the Fourth Proportional to 969.68, 1,453.74 and 392

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Solution

The fourth proportional to 969.68, 1,453.74 and 392 is: 587.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.68 : 1,453.74 = 392 : x
  2. Step 2: Convert to fraction form
    969.68/1,453.74 = 392/x
  3. Step 3: Cross multiply
    969.68x = 1,453.74 × 392
  4. Step 4: Simplify right side
    969.68x = 569,866.08
  5. Step 5: Solve for x
    x = 569,866.08/969.68
  6. Step 6: Final answer
    x = 587.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.