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Finding the Fourth Proportional to 676.38, 931.86 and 501.42

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Solution

The fourth proportional to 676.38, 931.86 and 501.42 is: 690.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.38 : 931.86 = 501.42 : x
  2. Step 2: Convert to fraction form
    676.38/931.86 = 501.42/x
  3. Step 3: Cross multiply
    676.38x = 931.86 × 501.42
  4. Step 4: Simplify right side
    676.38x = 467,253.24
  5. Step 5: Solve for x
    x = 467,253.24/676.38
  6. Step 6: Final answer
    x = 690.81

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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.