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Finding the Fourth Proportional to 384.93, 531.10 and 280.26

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Solution

The fourth proportional to 384.93, 531.10 and 280.26 is: 386.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.93 : 531.10 = 280.26 : x
  2. Step 2: Convert to fraction form
    384.93/531.10 = 280.26/x
  3. Step 3: Cross multiply
    384.93x = 531.10 × 280.26
  4. Step 4: Simplify right side
    384.93x = 148,846.09
  5. Step 5: Solve for x
    x = 148,846.09/384.93
  6. Step 6: Final answer
    x = 386.68

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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.