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Finding the Fourth Proportional to 525.06, 724.56 and 288.99

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Solution

The fourth proportional to 525.06, 724.56 and 288.99 is: 398.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.06 : 724.56 = 288.99 : x
  2. Step 2: Convert to fraction form
    525.06/724.56 = 288.99/x
  3. Step 3: Cross multiply
    525.06x = 724.56 × 288.99
  4. Step 4: Simplify right side
    525.06x = 209,390.59
  5. Step 5: Solve for x
    x = 209,390.59/525.06
  6. Step 6: Final answer
    x = 398.79

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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.