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Finding the Fourth Proportional to 902.18, 1,245 and 503.87

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Solution

The fourth proportional to 902.18, 1,245 and 503.87 is: 695.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.18 : 1,245 = 503.87 : x
  2. Step 2: Convert to fraction form
    902.18/1,245 = 503.87/x
  3. Step 3: Cross multiply
    902.18x = 1,245 × 503.87
  4. Step 4: Simplify right side
    902.18x = 627,321.26
  5. Step 5: Solve for x
    x = 627,321.26/902.18
  6. Step 6: Final answer
    x = 695.34

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Double scale
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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.