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Finding the Fourth Proportional to 2,126.79, 3,188.71 and 893.19

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Solution

The fourth proportional to 2,126.79, 3,188.71 and 893.19 is: 1,339.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.79 : 3,188.71 = 893.19 : x
  2. Step 2: Convert to fraction form
    2,126.79/3,188.71 = 893.19/x
  3. Step 3: Cross multiply
    2,126.79x = 3,188.71 × 893.19
  4. Step 4: Simplify right side
    2,126.79x = 2,848,136.96
  5. Step 5: Solve for x
    x = 2,848,136.96/2,126.79
  6. Step 6: Final answer
    x = 1,339.17

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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.