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Finding the Fourth Proportional to 1,285.61, 1,774.14 and 696.14

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Solution

The fourth proportional to 1,285.61, 1,774.14 and 696.14 is: 960.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.61 : 1,774.14 = 696.14 : x
  2. Step 2: Convert to fraction form
    1,285.61/1,774.14 = 696.14/x
  3. Step 3: Cross multiply
    1,285.61x = 1,774.14 × 696.14
  4. Step 4: Simplify right side
    1,285.61x = 1,235,049.82
  5. Step 5: Solve for x
    x = 1,235,049.82/1,285.61
  6. Step 6: Final answer
    x = 960.67

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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.