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Finding the Fourth Proportional to 930.41, 1,283.69 and 664.93

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Solution

The fourth proportional to 930.41, 1,283.69 and 664.93 is: 917.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.41 : 1,283.69 = 664.93 : x
  2. Step 2: Convert to fraction form
    930.41/1,283.69 = 664.93/x
  3. Step 3: Cross multiply
    930.41x = 1,283.69 × 664.93
  4. Step 4: Simplify right side
    930.41x = 853,567.26
  5. Step 5: Solve for x
    x = 853,567.26/930.41
  6. Step 6: Final answer
    x = 917.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.