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Finding the Fourth Proportional to 384.99, 531.28 and 210.33

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Solution

The fourth proportional to 384.99, 531.28 and 210.33 is: 290.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.99 : 531.28 = 210.33 : x
  2. Step 2: Convert to fraction form
    384.99/531.28 = 210.33/x
  3. Step 3: Cross multiply
    384.99x = 531.28 × 210.33
  4. Step 4: Simplify right side
    384.99x = 111,744.12
  5. Step 5: Solve for x
    x = 111,744.12/384.99
  6. Step 6: Final answer
    x = 290.25

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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.