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Finding the Fourth Proportional to 880.14, 1,214.75 and 548.78

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Solution

The fourth proportional to 880.14, 1,214.75 and 548.78 is: 757.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.14 : 1,214.75 = 548.78 : x
  2. Step 2: Convert to fraction form
    880.14/1,214.75 = 548.78/x
  3. Step 3: Cross multiply
    880.14x = 1,214.75 × 548.78
  4. Step 4: Simplify right side
    880.14x = 666,634.91
  5. Step 5: Solve for x
    x = 666,634.91/880.14
  6. Step 6: Final answer
    x = 757.42

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Double scale
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1.5x scale

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.