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Finding the Fourth Proportional to 893.43, 1,232.75 and 645.12

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Solution

The fourth proportional to 893.43, 1,232.75 and 645.12 is: 890.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.43 : 1,232.75 = 645.12 : x
  2. Step 2: Convert to fraction form
    893.43/1,232.75 = 645.12/x
  3. Step 3: Cross multiply
    893.43x = 1,232.75 × 645.12
  4. Step 4: Simplify right side
    893.43x = 795,273.29
  5. Step 5: Solve for x
    x = 795,273.29/893.43
  6. Step 6: Final answer
    x = 890.13

Related Problems

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Half scale
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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.