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Finding the Fourth Proportional to 385.57, 532.08 and 210.91

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Solution

The fourth proportional to 385.57, 532.08 and 210.91 is: 291.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.57 : 532.08 = 210.91 : x
  2. Step 2: Convert to fraction form
    385.57/532.08 = 210.91/x
  3. Step 3: Cross multiply
    385.57x = 532.08 × 210.91
  4. Step 4: Simplify right side
    385.57x = 112,220.99
  5. Step 5: Solve for x
    x = 112,220.99/385.57
  6. Step 6: Final answer
    x = 291.05

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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.