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Finding the Fourth Proportional to 525.90, 726.48 and 394.68

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Solution

The fourth proportional to 525.90, 726.48 and 394.68 is: 545.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.90 : 726.48 = 394.68 : x
  2. Step 2: Convert to fraction form
    525.90/726.48 = 394.68/x
  3. Step 3: Cross multiply
    525.90x = 726.48 × 394.68
  4. Step 4: Simplify right side
    525.90x = 286,727.13
  5. Step 5: Solve for x
    x = 286,727.13/525.90
  6. Step 6: Final answer
    x = 545.21

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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.