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Finding the Fourth Proportional to 637.14, 878.64 and 427.35

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Solution

The fourth proportional to 637.14, 878.64 and 427.35 is: 589.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.14 : 878.64 = 427.35 : x
  2. Step 2: Convert to fraction form
    637.14/878.64 = 427.35/x
  3. Step 3: Cross multiply
    637.14x = 878.64 × 427.35
  4. Step 4: Simplify right side
    637.14x = 375,486.80
  5. Step 5: Solve for x
    x = 375,486.80/637.14
  6. Step 6: Final answer
    x = 589.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.