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Finding the Fourth Proportional to 525.21, 724.51 and 328.65

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Solution

The fourth proportional to 525.21, 724.51 and 328.65 is: 453.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.21 : 724.51 = 328.65 : x
  2. Step 2: Convert to fraction form
    525.21/724.51 = 328.65/x
  3. Step 3: Cross multiply
    525.21x = 724.51 × 328.65
  4. Step 4: Simplify right side
    525.21x = 238,110.21
  5. Step 5: Solve for x
    x = 238,110.21/525.21
  6. Step 6: Final answer
    x = 453.36

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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.