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Finding the Fourth Proportional to 936.41, 1,291.57 and 671.09

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Solution

The fourth proportional to 936.41, 1,291.57 and 671.09 is: 925.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.41 : 1,291.57 = 671.09 : x
  2. Step 2: Convert to fraction form
    936.41/1,291.57 = 671.09/x
  3. Step 3: Cross multiply
    936.41x = 1,291.57 × 671.09
  4. Step 4: Simplify right side
    936.41x = 866,751.58
  5. Step 5: Solve for x
    x = 866,751.58/936.41
  6. Step 6: Final answer
    x = 925.62

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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.