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Finding the Fourth Proportional to 459.21, 688.71 and 185.34

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Solution

The fourth proportional to 459.21, 688.71 and 185.34 is: 277.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.21 : 688.71 = 185.34 : x
  2. Step 2: Convert to fraction form
    459.21/688.71 = 185.34/x
  3. Step 3: Cross multiply
    459.21x = 688.71 × 185.34
  4. Step 4: Simplify right side
    459.21x = 127,645.51
  5. Step 5: Solve for x
    x = 127,645.51/459.21
  6. Step 6: Final answer
    x = 277.97

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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.