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Finding the Fourth Proportional to 930.38, 1,283.23 and 615.09

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Solution

The fourth proportional to 930.38, 1,283.23 and 615.09 is: 848.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.38 : 1,283.23 = 615.09 : x
  2. Step 2: Convert to fraction form
    930.38/1,283.23 = 615.09/x
  3. Step 3: Cross multiply
    930.38x = 1,283.23 × 615.09
  4. Step 4: Simplify right side
    930.38x = 789,298.87
  5. Step 5: Solve for x
    x = 789,298.87/930.38
  6. Step 6: Final answer
    x = 848.36

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Double scale
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1.5x scale

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.