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Finding the Fourth Proportional to 525.43, 725.43 and 328.96

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Solution

The fourth proportional to 525.43, 725.43 and 328.96 is: 454.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.43 : 725.43 = 328.96 : x
  2. Step 2: Convert to fraction form
    525.43/725.43 = 328.96/x
  3. Step 3: Cross multiply
    525.43x = 725.43 × 328.96
  4. Step 4: Simplify right side
    525.43x = 238,637.45
  5. Step 5: Solve for x
    x = 238,637.45/525.43
  6. Step 6: Final answer
    x = 454.18

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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.