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Finding the Fourth Proportional to 525.52, 725.32 and 315.87

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Solution

The fourth proportional to 525.52, 725.32 and 315.87 is: 435.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.52 : 725.32 = 315.87 : x
  2. Step 2: Convert to fraction form
    525.52/725.32 = 315.87/x
  3. Step 3: Cross multiply
    525.52x = 725.32 × 315.87
  4. Step 4: Simplify right side
    525.52x = 229,103.20
  5. Step 5: Solve for x
    x = 229,103.20/525.52
  6. Step 6: Final answer
    x = 435.96

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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.