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Finding the Fourth Proportional to 969.08, 1,336.88 and 570.53

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Solution

The fourth proportional to 969.08, 1,336.88 and 570.53 is: 787.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.08 : 1,336.88 = 570.53 : x
  2. Step 2: Convert to fraction form
    969.08/1,336.88 = 570.53/x
  3. Step 3: Cross multiply
    969.08x = 1,336.88 × 570.53
  4. Step 4: Simplify right side
    969.08x = 762,720.61
  5. Step 5: Solve for x
    x = 762,720.61/969.08
  6. Step 6: Final answer
    x = 787.06

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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.