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Finding the Fourth Proportional to 675.63, 1,007.59 and 629.46

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Solution

The fourth proportional to 675.63, 1,007.59 and 629.46 is: 938.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.63 : 1,007.59 = 629.46 : x
  2. Step 2: Convert to fraction form
    675.63/1,007.59 = 629.46/x
  3. Step 3: Cross multiply
    675.63x = 1,007.59 × 629.46
  4. Step 4: Simplify right side
    675.63x = 634,237.60
  5. Step 5: Solve for x
    x = 634,237.60/675.63
  6. Step 6: Final answer
    x = 938.74

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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.