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Finding the Fourth Proportional to 893.40, 1,340.25 and 276.96

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Solution

The fourth proportional to 893.40, 1,340.25 and 276.96 is: 415.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.40 : 1,340.25 = 276.96 : x
  2. Step 2: Convert to fraction form
    893.40/1,340.25 = 276.96/x
  3. Step 3: Cross multiply
    893.40x = 1,340.25 × 276.96
  4. Step 4: Simplify right side
    893.40x = 371,195.64
  5. Step 5: Solve for x
    x = 371,195.64/893.40
  6. Step 6: Final answer
    x = 415.49

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.