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Finding the Fourth Proportional to 900.66, 1,241.34 and 664.34

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Solution

The fourth proportional to 900.66, 1,241.34 and 664.34 is: 915.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.66 : 1,241.34 = 664.34 : x
  2. Step 2: Convert to fraction form
    900.66/1,241.34 = 664.34/x
  3. Step 3: Cross multiply
    900.66x = 1,241.34 × 664.34
  4. Step 4: Simplify right side
    900.66x = 824,671.82
  5. Step 5: Solve for x
    x = 824,671.82/900.66
  6. Step 6: Final answer
    x = 915.63

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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.