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Finding the Fourth Proportional to 1,260.92, 1,893.24 and 990.32

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Solution

The fourth proportional to 1,260.92, 1,893.24 and 990.32 is: 1,486.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.92 : 1,893.24 = 990.32 : x
  2. Step 2: Convert to fraction form
    1,260.92/1,893.24 = 990.32/x
  3. Step 3: Cross multiply
    1,260.92x = 1,893.24 × 990.32
  4. Step 4: Simplify right side
    1,260.92x = 1,874,913.44
  5. Step 5: Solve for x
    x = 1,874,913.44/1,260.92
  6. Step 6: Final answer
    x = 1,486.94

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1.5x scale

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.