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Finding the Fourth Proportional to 1,234.79, 1,851.56 and 454.76

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Solution

The fourth proportional to 1,234.79, 1,851.56 and 454.76 is: 681.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.79 : 1,851.56 = 454.76 : x
  2. Step 2: Convert to fraction form
    1,234.79/1,851.56 = 454.76/x
  3. Step 3: Cross multiply
    1,234.79x = 1,851.56 × 454.76
  4. Step 4: Simplify right side
    1,234.79x = 842,022.96
  5. Step 5: Solve for x
    x = 842,022.96/1,234.79
  6. Step 6: Final answer
    x = 681.91

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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.