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Finding the Fourth Proportional to 902.41, 1,245.32 and 553.09

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Solution

The fourth proportional to 902.41, 1,245.32 and 553.09 is: 763.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.41 : 1,245.32 = 553.09 : x
  2. Step 2: Convert to fraction form
    902.41/1,245.32 = 553.09/x
  3. Step 3: Cross multiply
    902.41x = 1,245.32 × 553.09
  4. Step 4: Simplify right side
    902.41x = 688,774.04
  5. Step 5: Solve for x
    x = 688,774.04/902.41
  6. Step 6: Final answer
    x = 763.26

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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.