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Finding the Fourth Proportional to 940.89, 1,410.12 and 453.54

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Solution

The fourth proportional to 940.89, 1,410.12 and 453.54 is: 679.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.89 : 1,410.12 = 453.54 : x
  2. Step 2: Convert to fraction form
    940.89/1,410.12 = 453.54/x
  3. Step 3: Cross multiply
    940.89x = 1,410.12 × 453.54
  4. Step 4: Simplify right side
    940.89x = 639,545.82
  5. Step 5: Solve for x
    x = 639,545.82/940.89
  6. Step 6: Final answer
    x = 679.72

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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.