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Finding the Fourth Proportional to 525.89, 725.65 and 304.81

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Solution

The fourth proportional to 525.89, 725.65 and 304.81 is: 420.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.89 : 725.65 = 304.81 : x
  2. Step 2: Convert to fraction form
    525.89/725.65 = 304.81/x
  3. Step 3: Cross multiply
    525.89x = 725.65 × 304.81
  4. Step 4: Simplify right side
    525.89x = 221,182.80
  5. Step 5: Solve for x
    x = 221,182.80/525.89
  6. Step 6: Final answer
    x = 420.59

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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.