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Finding the Fourth Proportional to 1,194.21, 1,648.02 and 663.11

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Solution

The fourth proportional to 1,194.21, 1,648.02 and 663.11 is: 915.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,194.21 : 1,648.02 = 663.11 : x
  2. Step 2: Convert to fraction form
    1,194.21/1,648.02 = 663.11/x
  3. Step 3: Cross multiply
    1,194.21x = 1,648.02 × 663.11
  4. Step 4: Simplify right side
    1,194.21x = 1,092,810.30
  5. Step 5: Solve for x
    x = 1,092,810.30/1,194.21
  6. Step 6: Final answer
    x = 915.09

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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.