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Finding the Fourth Proportional to 525.39, 725.07 and 394.17

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Solution

The fourth proportional to 525.39, 725.07 and 394.17 is: 543.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.39 : 725.07 = 394.17 : x
  2. Step 2: Convert to fraction form
    525.39/725.07 = 394.17/x
  3. Step 3: Cross multiply
    525.39x = 725.07 × 394.17
  4. Step 4: Simplify right side
    525.39x = 285,800.84
  5. Step 5: Solve for x
    x = 285,800.84/525.39
  6. Step 6: Final answer
    x = 543.98

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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.