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Finding the Fourth Proportional to 736.66, 1,103.95 and 407.75

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Solution

The fourth proportional to 736.66, 1,103.95 and 407.75 is: 611.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.66 : 1,103.95 = 407.75 : x
  2. Step 2: Convert to fraction form
    736.66/1,103.95 = 407.75/x
  3. Step 3: Cross multiply
    736.66x = 1,103.95 × 407.75
  4. Step 4: Simplify right side
    736.66x = 450,133.30
  5. Step 5: Solve for x
    x = 450,133.30/736.66
  6. Step 6: Final answer
    x = 611.05

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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.