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Finding the Fourth Proportional to 676.76, 940.18 and 670.76

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Solution

The fourth proportional to 676.76, 940.18 and 670.76 is: 931.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.76 : 940.18 = 670.76 : x
  2. Step 2: Convert to fraction form
    676.76/940.18 = 670.76/x
  3. Step 3: Cross multiply
    676.76x = 940.18 × 670.76
  4. Step 4: Simplify right side
    676.76x = 630,635.14
  5. Step 5: Solve for x
    x = 630,635.14/676.76
  6. Step 6: Final answer
    x = 931.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.