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Finding the Fourth Proportional to 607.39, 911.46 and 278.28

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Solution

The fourth proportional to 607.39, 911.46 and 278.28 is: 417.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.39 : 911.46 = 278.28 : x
  2. Step 2: Convert to fraction form
    607.39/911.46 = 278.28/x
  3. Step 3: Cross multiply
    607.39x = 911.46 × 278.28
  4. Step 4: Simplify right side
    607.39x = 253,641.09
  5. Step 5: Solve for x
    x = 253,641.09/607.39
  6. Step 6: Final answer
    x = 417.59

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Double scale
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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.