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Finding the Fourth Proportional to 930.70, 1,284.16 and 537.65

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Solution

The fourth proportional to 930.70, 1,284.16 and 537.65 is: 741.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.70 : 1,284.16 = 537.65 : x
  2. Step 2: Convert to fraction form
    930.70/1,284.16 = 537.65/x
  3. Step 3: Cross multiply
    930.70x = 1,284.16 × 537.65
  4. Step 4: Simplify right side
    930.70x = 690,428.62
  5. Step 5: Solve for x
    x = 690,428.62/930.70
  6. Step 6: Final answer
    x = 741.84

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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.