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Finding the Fourth Proportional to 646.20, 969.48 and 372.24

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Solution

The fourth proportional to 646.20, 969.48 and 372.24 is: 558.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.20 : 969.48 = 372.24 : x
  2. Step 2: Convert to fraction form
    646.20/969.48 = 372.24/x
  3. Step 3: Cross multiply
    646.20x = 969.48 × 372.24
  4. Step 4: Simplify right side
    646.20x = 360,879.24
  5. Step 5: Solve for x
    x = 360,879.24/646.20
  6. Step 6: Final answer
    x = 558.46

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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.