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Finding the Fourth Proportional to 214.02, 320.85 and 77.04

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Solution

The fourth proportional to 214.02, 320.85 and 77.04 is: 115.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.02 : 320.85 = 77.04 : x
  2. Step 2: Convert to fraction form
    214.02/320.85 = 77.04/x
  3. Step 3: Cross multiply
    214.02x = 320.85 × 77.04
  4. Step 4: Simplify right side
    214.02x = 24,718.28
  5. Step 5: Solve for x
    x = 24,718.28/214.02
  6. Step 6: Final answer
    x = 115.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.