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Finding the Fourth Proportional to 925.80, 1,386.94 and 493.16

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Solution

The fourth proportional to 925.80, 1,386.94 and 493.16 is: 738.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.80 : 1,386.94 = 493.16 : x
  2. Step 2: Convert to fraction form
    925.80/1,386.94 = 493.16/x
  3. Step 3: Cross multiply
    925.80x = 1,386.94 × 493.16
  4. Step 4: Simplify right side
    925.80x = 683,983.33
  5. Step 5: Solve for x
    x = 683,983.33/925.80
  6. Step 6: Final answer
    x = 738.80

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Double scale
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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.