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Finding the Fourth Proportional to 385.17, 531.55 and 210.52

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Solution

The fourth proportional to 385.17, 531.55 and 210.52 is: 290.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.17 : 531.55 = 210.52 : x
  2. Step 2: Convert to fraction form
    385.17/531.55 = 210.52/x
  3. Step 3: Cross multiply
    385.17x = 531.55 × 210.52
  4. Step 4: Simplify right side
    385.17x = 111,898.66
  5. Step 5: Solve for x
    x = 111,898.66/385.17
  6. Step 6: Final answer
    x = 290.52

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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.