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Finding the Fourth Proportional to 676.71, 931.74 and 615.20

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Solution

The fourth proportional to 676.71, 931.74 and 615.20 is: 847.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.71 : 931.74 = 615.20 : x
  2. Step 2: Convert to fraction form
    676.71/931.74 = 615.20/x
  3. Step 3: Cross multiply
    676.71x = 931.74 × 615.20
  4. Step 4: Simplify right side
    676.71x = 573,201.79
  5. Step 5: Solve for x
    x = 573,201.79/676.71
  6. Step 6: Final answer
    x = 847.04

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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.