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Finding the Fourth Proportional to 191.51, 285.53 and 187.41

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Solution

The fourth proportional to 191.51, 285.53 and 187.41 is: 279.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.51 : 285.53 = 187.41 : x
  2. Step 2: Convert to fraction form
    191.51/285.53 = 187.41/x
  3. Step 3: Cross multiply
    191.51x = 285.53 × 187.41
  4. Step 4: Simplify right side
    191.51x = 53,511.31
  5. Step 5: Solve for x
    x = 53,511.31/191.51
  6. Step 6: Final answer
    x = 279.41

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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.