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Finding the Fourth Proportional to 651.03, 981.31 and 613.38

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Solution

The fourth proportional to 651.03, 981.31 and 613.38 is: 924.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.03 : 981.31 = 613.38 : x
  2. Step 2: Convert to fraction form
    651.03/981.31 = 613.38/x
  3. Step 3: Cross multiply
    651.03x = 981.31 × 613.38
  4. Step 4: Simplify right side
    651.03x = 601,915.93
  5. Step 5: Solve for x
    x = 601,915.93/651.03
  6. Step 6: Final answer
    x = 924.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.