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Finding the Fourth Proportional to 844.72, 1,165.40 and 495.28

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Solution

The fourth proportional to 844.72, 1,165.40 and 495.28 is: 683.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.72 : 1,165.40 = 495.28 : x
  2. Step 2: Convert to fraction form
    844.72/1,165.40 = 495.28/x
  3. Step 3: Cross multiply
    844.72x = 1,165.40 × 495.28
  4. Step 4: Simplify right side
    844.72x = 577,199.31
  5. Step 5: Solve for x
    x = 577,199.31/844.72
  6. Step 6: Final answer
    x = 683.30

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.