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Finding the Fourth Proportional to 743.81, 1,026.61 and 495.14

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Solution

The fourth proportional to 743.81, 1,026.61 and 495.14 is: 683.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.81 : 1,026.61 = 495.14 : x
  2. Step 2: Convert to fraction form
    743.81/1,026.61 = 495.14/x
  3. Step 3: Cross multiply
    743.81x = 1,026.61 × 495.14
  4. Step 4: Simplify right side
    743.81x = 508,309.30
  5. Step 5: Solve for x
    x = 508,309.30/743.81
  6. Step 6: Final answer
    x = 683.39

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Double scale
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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.