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Finding the Fourth Proportional to 848.82, 1,274.42 and 438.25

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Solution

The fourth proportional to 848.82, 1,274.42 and 438.25 is: 657.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.82 : 1,274.42 = 438.25 : x
  2. Step 2: Convert to fraction form
    848.82/1,274.42 = 438.25/x
  3. Step 3: Cross multiply
    848.82x = 1,274.42 × 438.25
  4. Step 4: Simplify right side
    848.82x = 558,514.57
  5. Step 5: Solve for x
    x = 558,514.57/848.82
  6. Step 6: Final answer
    x = 657.99

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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.