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Finding the Fourth Proportional to 901.09, 1,241.53 and 664.63

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Solution

The fourth proportional to 901.09, 1,241.53 and 664.63 is: 915.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.09 : 1,241.53 = 664.63 : x
  2. Step 2: Convert to fraction form
    901.09/1,241.53 = 664.63/x
  3. Step 3: Cross multiply
    901.09x = 1,241.53 × 664.63
  4. Step 4: Simplify right side
    901.09x = 825,158.08
  5. Step 5: Solve for x
    x = 825,158.08/901.09
  6. Step 6: Final answer
    x = 915.73

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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.