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Finding the Fourth Proportional to 1,330.61, 1,996.41 and 637.58

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Solution

The fourth proportional to 1,330.61, 1,996.41 and 637.58 is: 956.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.61 : 1,996.41 = 637.58 : x
  2. Step 2: Convert to fraction form
    1,330.61/1,996.41 = 637.58/x
  3. Step 3: Cross multiply
    1,330.61x = 1,996.41 × 637.58
  4. Step 4: Simplify right side
    1,330.61x = 1,272,871.09
  5. Step 5: Solve for x
    x = 1,272,871.09/1,330.61
  6. Step 6: Final answer
    x = 956.61

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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.