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Finding the Fourth Proportional to 940.41, 1,407.78 and 506.25

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Solution

The fourth proportional to 940.41, 1,407.78 and 506.25 is: 757.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.41 : 1,407.78 = 506.25 : x
  2. Step 2: Convert to fraction form
    940.41/1,407.78 = 506.25/x
  3. Step 3: Cross multiply
    940.41x = 1,407.78 × 506.25
  4. Step 4: Simplify right side
    940.41x = 712,688.63
  5. Step 5: Solve for x
    x = 712,688.63/940.41
  6. Step 6: Final answer
    x = 757.85

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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.