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Finding the Fourth Proportional to 969.55, 1,337.64 and 620.44

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Solution

The fourth proportional to 969.55, 1,337.64 and 620.44 is: 855.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.55 : 1,337.64 = 620.44 : x
  2. Step 2: Convert to fraction form
    969.55/1,337.64 = 620.44/x
  3. Step 3: Cross multiply
    969.55x = 1,337.64 × 620.44
  4. Step 4: Simplify right side
    969.55x = 829,925.36
  5. Step 5: Solve for x
    x = 829,925.36/969.55
  6. Step 6: Final answer
    x = 855.99

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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.