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Finding the Fourth Proportional to 526.67, 726.86 and 305.62

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Solution

The fourth proportional to 526.67, 726.86 and 305.62 is: 421.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.67 : 726.86 = 305.62 : x
  2. Step 2: Convert to fraction form
    526.67/726.86 = 305.62/x
  3. Step 3: Cross multiply
    526.67x = 726.86 × 305.62
  4. Step 4: Simplify right side
    526.67x = 222,142.95
  5. Step 5: Solve for x
    x = 222,142.95/526.67
  6. Step 6: Final answer
    x = 421.79

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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.