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Finding the Fourth Proportional to 940.98, 1,411.05 and 447.53

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Solution

The fourth proportional to 940.98, 1,411.05 and 447.53 is: 671.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.98 : 1,411.05 = 447.53 : x
  2. Step 2: Convert to fraction form
    940.98/1,411.05 = 447.53/x
  3. Step 3: Cross multiply
    940.98x = 1,411.05 × 447.53
  4. Step 4: Simplify right side
    940.98x = 631,479.94
  5. Step 5: Solve for x
    x = 631,479.94/940.98
  6. Step 6: Final answer
    x = 671.09

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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.