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Finding the Fourth Proportional to 969, 1,338.30 and 657.96

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Solution

The fourth proportional to 969, 1,338.30 and 657.96 is: 908.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    969 : 1,338.30 = 657.96 : x
  2. Step 2: Convert to fraction form
    969/1,338.30 = 657.96/x
  3. Step 3: Cross multiply
    969x = 1,338.30 × 657.96
  4. Step 4: Simplify right side
    969x = 880,547.87
  5. Step 5: Solve for x
    x = 880,547.87/969
  6. Step 6: Final answer
    x = 908.72

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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.