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Finding the Fourth Proportional to 1,235.63, 1,851.12 and 618.62

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Solution

The fourth proportional to 1,235.63, 1,851.12 and 618.62 is: 926.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.63 : 1,851.12 = 618.62 : x
  2. Step 2: Convert to fraction form
    1,235.63/1,851.12 = 618.62/x
  3. Step 3: Cross multiply
    1,235.63x = 1,851.12 × 618.62
  4. Step 4: Simplify right side
    1,235.63x = 1,145,130.60
  5. Step 5: Solve for x
    x = 1,145,130.60/1,235.63
  6. Step 6: Final answer
    x = 926.76

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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.