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Finding the Fourth Proportional to 525.99, 725.46 and 386.05

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Solution

The fourth proportional to 525.99, 725.46 and 386.05 is: 532.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.99 : 725.46 = 386.05 : x
  2. Step 2: Convert to fraction form
    525.99/725.46 = 386.05/x
  3. Step 3: Cross multiply
    525.99x = 725.46 × 386.05
  4. Step 4: Simplify right side
    525.99x = 280,060.21
  5. Step 5: Solve for x
    x = 280,060.21/525.99
  6. Step 6: Final answer
    x = 532.44

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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.