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Finding the Fourth Proportional to 503.36, 748.72 and 485.60

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Solution

The fourth proportional to 503.36, 748.72 and 485.60 is: 722.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.36 : 748.72 = 485.60 : x
  2. Step 2: Convert to fraction form
    503.36/748.72 = 485.60/x
  3. Step 3: Cross multiply
    503.36x = 748.72 × 485.60
  4. Step 4: Simplify right side
    503.36x = 363,578.43
  5. Step 5: Solve for x
    x = 363,578.43/503.36
  6. Step 6: Final answer
    x = 722.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.