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Finding the Fourth Proportional to 676.34, 1,007.13 and 651.74

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Solution

The fourth proportional to 676.34, 1,007.13 and 651.74 is: 970.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.34 : 1,007.13 = 651.74 : x
  2. Step 2: Convert to fraction form
    676.34/1,007.13 = 651.74/x
  3. Step 3: Cross multiply
    676.34x = 1,007.13 × 651.74
  4. Step 4: Simplify right side
    676.34x = 656,383.65
  5. Step 5: Solve for x
    x = 656,383.65/676.34
  6. Step 6: Final answer
    x = 970.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.