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Finding the Fourth Proportional to 385.01, 531.31 and 210.35

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Solution

The fourth proportional to 385.01, 531.31 and 210.35 is: 290.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.01 : 531.31 = 210.35 : x
  2. Step 2: Convert to fraction form
    385.01/531.31 = 210.35/x
  3. Step 3: Cross multiply
    385.01x = 531.31 × 210.35
  4. Step 4: Simplify right side
    385.01x = 111,763.14
  5. Step 5: Solve for x
    x = 111,763.14/385.01
  6. Step 6: Final answer
    x = 290.29

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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.