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Finding the Fourth Proportional to 1,235.10, 1,851.44 and 617.88

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Solution

The fourth proportional to 1,235.10, 1,851.44 and 617.88 is: 926.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.10 : 1,851.44 = 617.88 : x
  2. Step 2: Convert to fraction form
    1,235.10/1,851.44 = 617.88/x
  3. Step 3: Cross multiply
    1,235.10x = 1,851.44 × 617.88
  4. Step 4: Simplify right side
    1,235.10x = 1,143,967.75
  5. Step 5: Solve for x
    x = 1,143,967.75/1,235.10
  6. Step 6: Final answer
    x = 926.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.