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Finding the Fourth Proportional to 661.61, 994.04 and 651.89

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Solution

The fourth proportional to 661.61, 994.04 and 651.89 is: 979.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.61 : 994.04 = 651.89 : x
  2. Step 2: Convert to fraction form
    661.61/994.04 = 651.89/x
  3. Step 3: Cross multiply
    661.61x = 994.04 × 651.89
  4. Step 4: Simplify right side
    661.61x = 648,004.74
  5. Step 5: Solve for x
    x = 648,004.74/661.61
  6. Step 6: Final answer
    x = 979.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.