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Finding the Fourth Proportional to 902.48, 1,245.41 and 509.50

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Solution

The fourth proportional to 902.48, 1,245.41 and 509.50 is: 703.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.48 : 1,245.41 = 509.50 : x
  2. Step 2: Convert to fraction form
    902.48/1,245.41 = 509.50/x
  3. Step 3: Cross multiply
    902.48x = 1,245.41 × 509.50
  4. Step 4: Simplify right side
    902.48x = 634,537.31
  5. Step 5: Solve for x
    x = 634,537.31/902.48
  6. Step 6: Final answer
    x = 703.11

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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.