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Finding the Fourth Proportional to 493.80, 681.72 and 328.32

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Solution

The fourth proportional to 493.80, 681.72 and 328.32 is: 453.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.80 : 681.72 = 328.32 : x
  2. Step 2: Convert to fraction form
    493.80/681.72 = 328.32/x
  3. Step 3: Cross multiply
    493.80x = 681.72 × 328.32
  4. Step 4: Simplify right side
    493.80x = 223,822.31
  5. Step 5: Solve for x
    x = 223,822.31/493.80
  6. Step 6: Final answer
    x = 453.27

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1.5x scale

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.