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Finding the Fourth Proportional to 902.96, 1,245.44 and 553.04

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Solution

The fourth proportional to 902.96, 1,245.44 and 553.04 is: 762.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.96 : 1,245.44 = 553.04 : x
  2. Step 2: Convert to fraction form
    902.96/1,245.44 = 553.04/x
  3. Step 3: Cross multiply
    902.96x = 1,245.44 × 553.04
  4. Step 4: Simplify right side
    902.96x = 688,778.14
  5. Step 5: Solve for x
    x = 688,778.14/902.96
  6. Step 6: Final answer
    x = 762.80

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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.