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Finding the Fourth Proportional to 1,225.51, 1,838.27 and 495.60

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Solution

The fourth proportional to 1,225.51, 1,838.27 and 495.60 is: 743.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.51 : 1,838.27 = 495.60 : x
  2. Step 2: Convert to fraction form
    1,225.51/1,838.27 = 495.60/x
  3. Step 3: Cross multiply
    1,225.51x = 1,838.27 × 495.60
  4. Step 4: Simplify right side
    1,225.51x = 911,049.90
  5. Step 5: Solve for x
    x = 911,049.90/1,225.51
  6. Step 6: Final answer
    x = 743.40

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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.