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Finding the Fourth Proportional to 1,260.77, 1,891.34 and 336.40

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Solution

The fourth proportional to 1,260.77, 1,891.34 and 336.40 is: 504.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.77 : 1,891.34 = 336.40 : x
  2. Step 2: Convert to fraction form
    1,260.77/1,891.34 = 336.40/x
  3. Step 3: Cross multiply
    1,260.77x = 1,891.34 × 336.40
  4. Step 4: Simplify right side
    1,260.77x = 636,242.89
  5. Step 5: Solve for x
    x = 636,242.89/1,260.77
  6. Step 6: Final answer
    x = 504.65

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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.