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Finding the Fourth Proportional to 1,235.20, 1,851.93 and 618.47

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Solution

The fourth proportional to 1,235.20, 1,851.93 and 618.47 is: 927.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.20 : 1,851.93 = 618.47 : x
  2. Step 2: Convert to fraction form
    1,235.20/1,851.93 = 618.47/x
  3. Step 3: Cross multiply
    1,235.20x = 1,851.93 × 618.47
  4. Step 4: Simplify right side
    1,235.20x = 1,145,353.89
  5. Step 5: Solve for x
    x = 1,145,353.89/1,235.20
  6. Step 6: Final answer
    x = 927.26

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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.