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Finding the Fourth Proportional to 969.86, 1,453.91 and 623.45

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Solution

The fourth proportional to 969.86, 1,453.91 and 623.45 is: 934.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.86 : 1,453.91 = 623.45 : x
  2. Step 2: Convert to fraction form
    969.86/1,453.91 = 623.45/x
  3. Step 3: Cross multiply
    969.86x = 1,453.91 × 623.45
  4. Step 4: Simplify right side
    969.86x = 906,429.80
  5. Step 5: Solve for x
    x = 906,429.80/969.86
  6. Step 6: Final answer
    x = 934.60

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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.