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Finding the Fourth Proportional to 501.34, 691.77 and 280.26

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Solution

The fourth proportional to 501.34, 691.77 and 280.26 is: 386.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.34 : 691.77 = 280.26 : x
  2. Step 2: Convert to fraction form
    501.34/691.77 = 280.26/x
  3. Step 3: Cross multiply
    501.34x = 691.77 × 280.26
  4. Step 4: Simplify right side
    501.34x = 193,875.46
  5. Step 5: Solve for x
    x = 193,875.46/501.34
  6. Step 6: Final answer
    x = 386.71

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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.