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Finding the Fourth Proportional to 969.25, 1,337.76 and 555.25

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Solution

The fourth proportional to 969.25, 1,337.76 and 555.25 is: 766.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.25 : 1,337.76 = 555.25 : x
  2. Step 2: Convert to fraction form
    969.25/1,337.76 = 555.25/x
  3. Step 3: Cross multiply
    969.25x = 1,337.76 × 555.25
  4. Step 4: Simplify right side
    969.25x = 742,791.24
  5. Step 5: Solve for x
    x = 742,791.24/969.25
  6. Step 6: Final answer
    x = 766.36

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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.