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Finding the Fourth Proportional to 1,480.41, 2,042.46 and 920.61

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Solution

The fourth proportional to 1,480.41, 2,042.46 and 920.61 is: 1,270.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.41 : 2,042.46 = 920.61 : x
  2. Step 2: Convert to fraction form
    1,480.41/2,042.46 = 920.61/x
  3. Step 3: Cross multiply
    1,480.41x = 2,042.46 × 920.61
  4. Step 4: Simplify right side
    1,480.41x = 1,880,309.10
  5. Step 5: Solve for x
    x = 1,880,309.10/1,480.41
  6. Step 6: Final answer
    x = 1,270.13

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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.