Home / 930-1,394.90-491.08

Finding the Fourth Proportional to 930, 1,394.90 and 491.08

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Solution

The fourth proportional to 930, 1,394.90 and 491.08 is: 736.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    930 : 1,394.90 = 491.08 : x
  2. Step 2: Convert to fraction form
    930/1,394.90 = 491.08/x
  3. Step 3: Cross multiply
    930x = 1,394.90 × 491.08
  4. Step 4: Simplify right side
    930x = 685,007.49
  5. Step 5: Solve for x
    x = 685,007.49/930
  6. Step 6: Final answer
    x = 736.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.