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Finding the Fourth Proportional to 1,511.73, 2,084.74 and 914.11

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Solution

The fourth proportional to 1,511.73, 2,084.74 and 914.11 is: 1,260.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.73 : 2,084.74 = 914.11 : x
  2. Step 2: Convert to fraction form
    1,511.73/2,084.74 = 914.11/x
  3. Step 3: Cross multiply
    1,511.73x = 2,084.74 × 914.11
  4. Step 4: Simplify right side
    1,511.73x = 1,905,674.18
  5. Step 5: Solve for x
    x = 1,905,674.18/1,511.73
  6. Step 6: Final answer
    x = 1,260.59

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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.