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Finding the Fourth Proportional to 214.68, 320.60 and 187.32

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Solution

The fourth proportional to 214.68, 320.60 and 187.32 is: 279.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.68 : 320.60 = 187.32 : x
  2. Step 2: Convert to fraction form
    214.68/320.60 = 187.32/x
  3. Step 3: Cross multiply
    214.68x = 320.60 × 187.32
  4. Step 4: Simplify right side
    214.68x = 60,054.79
  5. Step 5: Solve for x
    x = 60,054.79/214.68
  6. Step 6: Final answer
    x = 279.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.