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Finding the Fourth Proportional to 525.90, 725.64 and 394.68

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Solution

The fourth proportional to 525.90, 725.64 and 394.68 is: 544.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.90 : 725.64 = 394.68 : x
  2. Step 2: Convert to fraction form
    525.90/725.64 = 394.68/x
  3. Step 3: Cross multiply
    525.90x = 725.64 × 394.68
  4. Step 4: Simplify right side
    525.90x = 286,395.60
  5. Step 5: Solve for x
    x = 286,395.60/525.90
  6. Step 6: Final answer
    x = 544.58

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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.