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Finding the Fourth Proportional to 1,418.26, 1,955.13 and 920.71

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Solution

The fourth proportional to 1,418.26, 1,955.13 and 920.71 is: 1,269.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.26 : 1,955.13 = 920.71 : x
  2. Step 2: Convert to fraction form
    1,418.26/1,955.13 = 920.71/x
  3. Step 3: Cross multiply
    1,418.26x = 1,955.13 × 920.71
  4. Step 4: Simplify right side
    1,418.26x = 1,800,107.74
  5. Step 5: Solve for x
    x = 1,800,107.74/1,418.26
  6. Step 6: Final answer
    x = 1,269.24

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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.