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Finding the Fourth Proportional to 525.48, 725.28 and 304.50

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Solution

The fourth proportional to 525.48, 725.28 and 304.50 is: 420.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.48 : 725.28 = 304.50 : x
  2. Step 2: Convert to fraction form
    525.48/725.28 = 304.50/x
  3. Step 3: Cross multiply
    525.48x = 725.28 × 304.50
  4. Step 4: Simplify right side
    525.48x = 220,847.76
  5. Step 5: Solve for x
    x = 220,847.76/525.48
  6. Step 6: Final answer
    x = 420.28

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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.