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Finding the Fourth Proportional to 905.38, 1,248.94 and 551.14

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Solution

The fourth proportional to 905.38, 1,248.94 and 551.14 is: 760.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.38 : 1,248.94 = 551.14 : x
  2. Step 2: Convert to fraction form
    905.38/1,248.94 = 551.14/x
  3. Step 3: Cross multiply
    905.38x = 1,248.94 × 551.14
  4. Step 4: Simplify right side
    905.38x = 688,340.79
  5. Step 5: Solve for x
    x = 688,340.79/905.38
  6. Step 6: Final answer
    x = 760.28

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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.