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Finding the Fourth Proportional to 930.38, 1,283.94 and 537.40

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Solution

The fourth proportional to 930.38, 1,283.94 and 537.40 is: 741.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.38 : 1,283.94 = 537.40 : x
  2. Step 2: Convert to fraction form
    930.38/1,283.94 = 537.40/x
  3. Step 3: Cross multiply
    930.38x = 1,283.94 × 537.40
  4. Step 4: Simplify right side
    930.38x = 689,986.15
  5. Step 5: Solve for x
    x = 689,986.15/930.38
  6. Step 6: Final answer
    x = 741.62

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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.