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Finding the Fourth Proportional to 1,260.60, 1,891.10 and 636.49

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Solution

The fourth proportional to 1,260.60, 1,891.10 and 636.49 is: 954.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.60 : 1,891.10 = 636.49 : x
  2. Step 2: Convert to fraction form
    1,260.60/1,891.10 = 636.49/x
  3. Step 3: Cross multiply
    1,260.60x = 1,891.10 × 636.49
  4. Step 4: Simplify right side
    1,260.60x = 1,203,666.24
  5. Step 5: Solve for x
    x = 1,203,666.24/1,260.60
  6. Step 6: Final answer
    x = 954.84

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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.