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Finding the Fourth Proportional to 941.14, 1,297.56 and 645.90

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Solution

The fourth proportional to 941.14, 1,297.56 and 645.90 is: 890.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.14 : 1,297.56 = 645.90 : x
  2. Step 2: Convert to fraction form
    941.14/1,297.56 = 645.90/x
  3. Step 3: Cross multiply
    941.14x = 1,297.56 × 645.90
  4. Step 4: Simplify right side
    941.14x = 838,094.00
  5. Step 5: Solve for x
    x = 838,094.00/941.14
  6. Step 6: Final answer
    x = 890.51

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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.